{"title":"M278 Performance Parts for Mercedes E550 \/ CLS550 \/ S550 \/ SL550 \/ CL550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 980px; margin: 0 auto; line-height: 1.65; color: #222;\"\u003e\n\u003c!-- SEO H1 --\u003e\n\u003ch1 style=\"font-size: 28px; margin: 12px 0 18px;\"\u003eM278 Performance Parts \u0026amp; Upgrades for Mercedes-Benz E550 \/ CLS550 \/ S550 \/ SL550 \/ CL550\u003c\/h1\u003e\n\u003c!-- Keyword-Dense Intro --\u003e\n\u003cp style=\"font-size: 15px; margin-bottom: 16px;\"\u003eUnlock the full potential of your Mercedes-Benz \u003cstrong\u003eM278 4.7L BiTurbo V8\u003c\/strong\u003e with proven performance upgrades engineered for \u003cstrong\u003eE 550, CLS 550, S 550, SL 550, and CL 550\u003c\/strong\u003e models. Improve airflow, cooling, throttle response, longevity, and real-world acceleration with high-quality M278 parts tested across all 550 platforms.\u003c\/p\u003e\n\u003c!-- Main Body Content --\u003e\n\u003cp\u003eThe Mercedes-Benz \u003cstrong\u003eM278\u003c\/strong\u003e engine is one of the most capable and underrated modern V8s ever produced. Found in the 550-class models, this 4.7L twin-turbo works beautifully with the right supporting modifications. Whether your goal is sharper throttle response, more midrange torque, reduced heat soak, or improved reliability, these upgrades deliver measurable performance gains without sacrificing daily drivability.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 26px;\"\u003e🔥 Top Recommended M278 Upgrades\u003c\/h2\u003e\n\u003c!-- Product Grid --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 22px; margin-top: 18px;\"\u003e\n\u003c!-- Spacer Kit --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eM278 Intake Filter Spacer Kit\u003c\/h3\u003e\n\u003cp\u003eImprove airflow efficiency, reduce restriction, and increase top-end breathing. A must-have for tuned or stock engines.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-intake-filter-spacer-kit\"\u003eShop Spacer Kit →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- ECU Tune --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eCustom ECU Tuning for M278\u003c\/h3\u003e\n\u003cp\u003eUnlock up to 300 lb-ft of hidden torque. Transform your E550, CLS550, or S550 with proper calibration.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-ecu-tune\"\u003eShop ECU Tune →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Aluminum Intake Tubes --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eAluminum Intake Tubes – M278\u003c\/h3\u003e\n\u003cp\u003eReplace heat-soaked plastic tubes with high-flow aluminum for better temperature stability and durability.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-aluminum-intake-tubes\"\u003eShop Intake Tubes →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Pulley Set --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003e2-Piece Billet Aluminum Pulley Set\u003c\/h3\u003e\n\u003cp\u003eReduce rotational drag and improve belt stability with precision CNC-machined M278 pulleys.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-billet-pulley-set\"\u003eShop Pulley Set →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Turbo Blankets --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eM278 Turbo Blankets – Heat Shield Upgrade\u003c\/h3\u003e\n\u003cp\u003eReduce underhood temps and improve turbo response with high-temp turbo insulation.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-turbo-blankets\"\u003eShop Turbo Blankets →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Idler Set --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003e5-Piece CNC Idler Pulley Set\u003c\/h3\u003e\n\u003cp\u003eQuiet operation, zero wobble, and long-term reliability. Superior to OEM replacements.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-idler-pulley-set\"\u003eShop Idler Set →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Engine Mounts --\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; padding: 16px; border-radius: 10px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eBillet Polyurethane Engine Mounts\u003c\/h3\u003e\n\u003cp\u003eReduce drivetrain movement and improve throttle response without harsh NVH. Ideal for tuned M278 cars.\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 10px 18px; background: #111; color: #fff; border-radius: 8px; text-decoration: none; font-weight: bold;\" href=\"\/products\/m278-engine-mounts\"\u003eShop Engine Mounts →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Bottom Section --\u003e\n\u003ch2 style=\"margin-top: 36px;\"\u003eWhy Upgrade Your Mercedes 550 With M278 Mods?\u003c\/h2\u003e\n\u003cp\u003eThe M278 responds exceptionally well to airflow improvements, heat management upgrades, and optimized calibration. What starts as a quiet, refined luxury V8 becomes a torque-rich performance platform when supporting parts are added. All products in this collection are chosen for real-world gains, not hype.\u003c\/p\u003e\n\u003cp\u003eWhether you daily your E550, cruise your CLS550, or enjoy the comfort of an S550, these upgrades improve acceleration, responsiveness, and long-term reliability.\u003c\/p\u003e\n\u003c!-- Hidden SEO Tags --\u003e \u003cspan style=\"display: none;\"\u003e M278 performance parts, Mercedes 4.7L V8 biturbo upgrades, E550 performance parts, CLS550 turbo upgrade, S550 M278 tuning, SL550 performance mods, CL550 M278 upgrades, M278 intake spacer, M278 ECU tune, Mercedes twin turbo 4.7 upgrades, M278 aftermarket parts, Mercedes 550 performance \u003c\/span\u003e\n\u003c\/div\u003e","products":[{"product_id":"custom-ecu-tuning-for-m278-4-7l-v8-biturbo-e550-cls550-s550-cl550-ml550","title":"Custom ECU Tuning for M278 4.7L V8 BiTurbo E550 CLS550 S550 CL550 ML550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #333; line-height: 1.6; max-width: 820px; margin: auto;\"\u003e\n\u003c!-- SEO SUMMARY BLOCK --\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; text-align: center; font-size: 13px; margin: 15px 0; gap: 10px;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: center; font-size: 18px; font-weight: bold; color: #cc0000;\"\u003eUp to 541 HP and 751 lb-ft with safe, OEM-level calibration.\u003c\/p\u003e\n\u003c!-- INTRO --\u003e\n\u003cp style=\"font-size: 15px; text-align: justify;\"\u003eThis custom ECU tune unlocks the full potential of Mercedes’ \u003cstrong\u003eM278 4.7L BiTurbo\u003c\/strong\u003e, delivering massive increases in horsepower, torque, and throttle response while preserving factory safeguards. Designed specifically for E-Class, CLS-Class, S-Class, CL-Class, and ML-Class models equipped with the M278 engine.\u003c\/p\u003e\n\u003c!-- WHY TUNE --\u003e\n\u003ch3 style=\"color: #004aad; font-size: 18px; margin-top: 25px;\"\u003e💥 Key Benefits\u003c\/h3\u003e\n\u003cul style=\"font-size: 15px; margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e+139 HP \/ +290 lb-ft:\u003c\/strong\u003e Among the highest proven gains for the M278 platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Safety Retained:\u003c\/strong\u003e Knock control, fuel trims, boost protection, and temperature limits remain active.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper Response:\u003c\/strong\u003e Better throttle feel and stronger mid-range acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull OEM Integration:\u003c\/strong\u003e No piggybacks — proper ECU calibration using factory-grade tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Mapping:\u003c\/strong\u003e Optimized versions available for downpipes, 93 octane, or supporting mods.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- COMPATIBILITY --\u003e\n\u003ch3 style=\"color: #004aad; font-size: 18px; margin-top: 25px;\"\u003e📌 Compatible Mercedes-Benz Models (M278 4.7L BiTurbo)\u003c\/h3\u003e\n\u003cul style=\"font-size: 15px; margin-left: 20px;\"\u003e\n\u003cli\u003e2012–2018 E550\u003c\/li\u003e\n\u003cli\u003e2012–2018 CLS550\u003c\/li\u003e\n\u003cli\u003e2012–2017 S550\u003c\/li\u003e\n\u003cli\u003e2012–2014 CL550\u003c\/li\u003e\n\u003cli\u003e2012–2015 ML550\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- HOW IT WORKS --\u003e\n\u003ch3 style=\"color: #004aad; font-size: 18px; margin-top: 25px;\"\u003e🔧 How the Process Works\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px;\"\u003eYour ECU file is read, calibrated, and flashed using OEM-level equipment. Boost targets, ignition timing, torque limits, and fuel delivery are optimized for safe, consistent gains. No wiring, piggyback boxes, or unreliable modules.\u003c\/p\u003e\n\u003c!-- RESULTS --\u003e\n\u003ch3 style=\"color: #004aad; font-size: 18px; margin-top: 25px;\"\u003e🎯 Performance Gains\u003c\/h3\u003e\n\u003cul style=\"font-size: 15px; margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock:\u003c\/strong\u003e ~402 HP \/ 516 lb-ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTuned:\u003c\/strong\u003e ~541 HP \/ 751 lb-ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Gain:\u003c\/strong\u003e +139 HP \/ +290 lb-ft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 13px; color: #666;\"\u003eActual results vary based on fuel quality, altitude, and vehicle condition.\u003c\/p\u003e\n\u003c!-- CTA FOR M278 COLLECTION --\u003e\n\u003cdiv style=\"text-align: center; margin-top: 35px;\"\u003e\u003ca style=\"background: #004aad; color: #fff; padding: 12px 30px; border-radius: 5px; font-size: 16px; text-decoration: none; font-weight: bold;\" href=\"https:\/\/benzunitedparts.com\/collections\/m278-performance-parts-for-mercedes-e550-cls550-s550-sl550-cl550?_pos=1\u0026amp;_psq=m278\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003e 🔥 Browse All M278 Performance Upgrades \u003c\/a\u003e\u003c\/div\u003e\n\u003c!-- FOOTER --\u003e\n\u003cdiv style=\"font-size: 13px; color: #666; margin-top: 30px; border-top: 1px solid #ccc; padding-top: 10px; text-align: center;\"\u003e\n\u003cp\u003e\u003cstrong\u003eBenzUnited Performance\u003c\/strong\u003e – Proven, Reliable Mercedes ECU Tuning\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":44575033721007,"sku":"","price":2500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/Imercedes-m278-engine-ecu-tuning-e550-cls550-s550.jpg?v=1764838188"},{"product_id":"12-18-mercedes-cls550-cls400-steel-braided-brake-line-kit-custom-colors-stainless-lines-for-c-class-w204-amg-copy-1","title":"2012-2018 Mercedes CLS550 \/ CLS400 W218 Stainless Steel Braided Brake Lines – Brake Line Upgrade Kit","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #333; line-height: 1.6; padding: 20px; max-width: 800px; margin: auto; text-align: left;\"\u003e\n\u003c!-- TITLE + IMAGE --\u003e\n\u003ch2 style=\"text-align: center; color: #0056b3;\"\u003eStainless Steel Braided Brake Lines for Mercedes CLS550 (C218)\u003c\/h2\u003e\n\u003cp style=\"text-align: center; margin-bottom: 20px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/p0ara2c8.png?v=1732236468\" style=\"max-width: 100%; height: auto;\" alt=\"Mercedes CLS550 stainless steel braided brake line kit\"\u003e\u003c\/p\u003e\n\u003c!-- PERFORMANCE BOX --\u003e\n\u003cdiv style=\"border: 2px solid #ddd; padding: 15px; background-color: #f9f9f9; margin-bottom: 25px;\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eUpgrade your CLS braking performance.\u003c\/strong\u003e OEM rubber hoses expand under pressure, creating inconsistent pedal feel—especially on heavier, high-torque vehicles like the Mercedes-Benz CLS550. Our stainless steel braided brake lines deliver sharper response, reduced fade, and improved braking precision.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WHY BRAIDED --\u003e\n\u003ch2 style=\"color: #0056b3;\"\u003eWhy Choose Braided Brake Lines?\u003c\/h2\u003e\n\u003cul style=\"padding-left: 20px; margin: 0;\"\u003e\n\u003cli\u003e✔ Eliminates soft or spongy pedal feel under aggressive braking\u003c\/li\u003e\n\u003cli\u003e✔ Improves braking precision and stopping consistency\u003c\/li\u003e\n\u003cli\u003e✔ Increased durability using corrosion-resistant stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- PERFORMANCE BUILD --\u003e\n\u003ch2 style=\"color: #0056b3;\"\u003eBuilt for Performance\u003c\/h2\u003e\n\u003cp\u003eEvery brake line kit is manufactured to exceed OEM standards and maintain consistent hydraulic pressure under heat and load.\u003c\/p\u003e\n\u003cul style=\"padding-left: 20px; margin-bottom: 25px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless steel fittings:\u003c\/strong\u003e Prevent corrosion and ensure long-term reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePTFE inner hose:\u003c\/strong\u003e Engineered for extreme pressure and temperature resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifetime guarantee:\u003c\/strong\u003e Confidence in every braking situation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- FITMENT --\u003e\n\u003ch2 style=\"color: #0056b3;\"\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e2012–2018 Mercedes-Benz CLS550 (C218)\u003c\/strong\u003e – 4.7L V8 BiTurbo (M278)\u003c\/p\u003e\n\u003c!-- COLORS --\u003e\n\u003ch2 style=\"color: #0056b3; text-align: center; margin-top: 20px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/a9h697c8.png?v=1732166536\" style=\"max-width: 100%; height: auto;\" alt=\"Performance brake line color options\"\u003e \u003cbr\u003eChoose the Color That Matches Your Style\u003c\/h2\u003e\n\u003cp style=\"text-align: center; margin-bottom: 25px;\"\u003eAvailable in OEM-style black or a wide range of performance-inspired colors. Select your preferred finish at checkout.\u003c\/p\u003e\n\u003c!-- KIT INCLUDES --\u003e\n\u003ch2 style=\"color: #0056b3;\"\u003eKit Includes:\u003c\/h2\u003e\n\u003cul style=\"list-style: none; padding-left: 0; margin-bottom: 25px;\"\u003e\n\u003cli\u003e✔ 4 stainless steel braided brake lines (front + rear)\u003c\/li\u003e\n\u003cli\u003e✔ Stainless steel banjo bolts (if required)\u003c\/li\u003e\n\u003cli\u003e✔ Copper crush washers (if required)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- SPECS --\u003e\n\u003ch2 style=\"color: #0056b3;\"\u003eSpecifications:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 25px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #ddd;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ccc;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eLine Inner Material\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003ePTFE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eOuter Material\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eStainless steel braid with PVC coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eFittings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e303\/304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e-70°C to 260°C (-94°F to 500°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eInside Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eOutside Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e7.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eMax Working Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e290 Bar (4206 PSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eBurst Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e870 Bar (12618 PSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eMinimum Bend Radius\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e38mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"text-align: center; margin-bottom: 25px;\"\u003eDon’t settle for zinc-plated fittings that corrode. Our stainless-steel components provide long-term reliability and consistent braking performance.\u003c\/p\u003e\n\u003c!-- CTA --\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Black","offer_id":46380492751023,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Carbon","offer_id":46380492783791,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":46380492816559,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":46380492849327,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Orange","offer_id":46380492882095,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Yellow","offer_id":46380492914863,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"White","offer_id":46380492947631,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Kawasaki Green","offer_id":46380492980399,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Transparent Red","offer_id":46380493013167,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Transparent Purple","offer_id":46380493045935,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Transparent Blue","offer_id":46380493078703,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true},{"title":"Transparent","offer_id":46380493111471,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/mercedes-cls550-cls400-w218-stainless-braided-brake-lines-kit.jpg?v=1765365063"},{"product_id":"amg-m278-4-7l-biturbo-intake-spacer-kit-e550-cls550-s550-cl550-sl550","title":"Mercedes-Benz M278 Intake Filter Spacer Kit – 4.7L V8 BiTurbo E550, CLS550, S550, SL550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 900px; margin: 0 auto; line-height: 1.65; color: #222; font-size: 16px;\"\u003e\n\u003c!-- Lead --\u003e\n\u003cp\u003e\u003cstrong\u003eUnlock the airflow your 4.7L BiTurbo should have had from the factory.\u003c\/strong\u003e This CNC-machined \u003cstrong\u003eIntake Filter Spacer Kit\u003c\/strong\u003e for the \u003cstrong\u003eM278 (4.7L V8 BiTurbo)\u003c\/strong\u003e eliminates a known choke point inside the OEM airbox, improving airflow efficiency, sharpening throttle response, and giving the M278 a noticeably freer, stronger midrange — all while keeping a stock-clean engine bay.\u003c\/p\u003e\n\u003c!-- Key Features --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003e🔥 Key Features for M278 Twin-Turbo V8\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces the factory choke point:\u003c\/strong\u003e Lifts the filter into the optimal flow path, increasing effective inlet area and smoothing turbulence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with OEM \u0026amp; high-flow filters:\u003c\/strong\u003e Fully compatible with Mercedes paper filters and all performance filter upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM engine cover compatible:\u003c\/strong\u003e Maintains a completely stock appearance — ideal for sleeper builds and inspection-safe mods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC-machined aluminum:\u003c\/strong\u003e Heat-stable, corrosion-resistant, and precision-fit for every M278 airbox.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Cerakote finish:\u003c\/strong\u003e Available in stealth black or custom colors with engraving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Performance Benefits --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003e📈 Real-World Benefits on M278 Models\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuicker turbo spool:\u003c\/strong\u003e Lower restriction means the turbos ramp up sooner and with less effort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmoother, stronger midrange:\u003c\/strong\u003e Exactly where the M278 spends most of its time — daily driving, freeway pulls, and overtakes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore headroom when tuned:\u003c\/strong\u003e Helps prevent airflow bottlenecks that show up on tuned 4.7L BiTurbo setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerfect stealth mod:\u003c\/strong\u003e Hidden inside the airbox — zero visible changes under the hood.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNo tune required — fully compatible with stock ECU mapping.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ca style=\"background: #0b6c3e; color: #fff; padding: 12px 28px; border-radius: 8px; font-weight: bold; text-decoration: none; font-size: 16px; display: inline-block;\" href=\"https:\/\/benzunitedparts.com\/products\/custom-ecu-tuning-for-m278-4-7l-v8-biturbo-e550-cls550-s550-cl550-ml550\"\u003e⚡ ECU Tuning — Optimized for Mods\u003c\/a\u003e\u003c\/p\u003e\n\u003c!-- CTA: Turbo Blankets (HOT SPOT PLACEMENT) --\u003e\u003c!-- Why It Works --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003e🔬 Why the Spacer Works\u003c\/h3\u003e\n\u003cp\u003eThe factory M278 airbox has a restriction where the filter seals against the upper lid. At higher airflow levels, this lip becomes a bottleneck, increasing turbulence and reducing effective inlet area. Raising the filter slightly fixes this — improving compressor efficiency, airflow stability, and response under load.\u003c\/p\u003e\n\u003c!-- Compatibility Table --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003e✔️ Compatibility – M278 4.7L BiTurbo V8\u003c\/h3\u003e\n\u003cp\u003eFits all Mercedes-Benz models equipped with the \u003cstrong\u003eM278 4.7L BiTurbo V8\u003c\/strong\u003e engine:\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; text-align: left; margin: 14px 0; font-size: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #f2f2f2;\"\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px;\"\u003eTrim\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px;\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eE-Class (W212)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eE 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2011–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCLS-Class (W218)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCLS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2012–2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eS-Class (W221\/W222)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2011–2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eSL-Class (R231)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eSL 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2013–2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCL-Class (C216)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCL 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2011–2014\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGL-Class (X166)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGL 450 \/ GL 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2013–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGLS-Class (X166)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGLS 450 \/ GLS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2017–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eML-Class (W166)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eML 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2012–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGLE-Class (W166)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGLE 450 \/ GLE 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2016–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 13px; color: #555;\"\u003eNote: Only fits \u003cstrong\u003eM278 4.7L V8 BiTurbo\u003c\/strong\u003e. Does not fit the M276 3.0L V6 found in some 450 models.\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: rgb(85, 85, 85); text-align: center;\"\u003e\u003ca style=\"background: #0b6c3e; color: #fff; padding: 12px 28px; border-radius: 8px; font-weight: bold; text-decoration: none; font-size: 16px; display: inline-block;\" href=\"https:\/\/benzunitedparts.com\/products\/m278-turbo-blankets-heat-shield-upgrade-for-e550-cls550-s550\"\u003e ⚡ Turbo Blankets – Heat Shield Upgrade\u003c\/a\u003e\u003c\/p\u003e\n\u003c!-- CTA: ECU Tune (PLACED WHERE CUSTOMERS CHECK FITMENT → HIGH BUY INTENT) --\u003e\u003c!-- Install --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003e🧰 Installation \u0026amp; Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt-on:\u003c\/strong\u003e Installs at the airbox\/filter interface with no cutting or modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-style sealing:\u003c\/strong\u003e Maintains proper gasket compression around the filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIY-friendly:\u003c\/strong\u003e Basic tools, 10–15 minutes per side.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Included --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003e📦 What’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e(2) CNC-machined aluminum intake spacers (left + right)\u003c\/li\u003e\n\u003cli\u003eDigital installation guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Why Trust BenzUnited --\u003e\n\u003ch3 style=\"margin-top: 26px;\"\u003e🏁 Why Trust BenzUnited Performance Parts?\u003c\/h3\u003e\n\u003cp\u003eWe’ve spent over \u003cstrong\u003e12 years\u003c\/strong\u003e testing and tuning various Mercedes-Benz platforms. Our development process is based on real driving, data logging, and long-term ownership.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform expertise:\u003c\/strong\u003e We build upgrades specifically for Mercedes V8 turbo engines — not universal parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo hype, no guesswork:\u003c\/strong\u003e If a mod doesn’t show improvement in throttle response, airflow stability, or real acceleration — we don’t sell it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM+ philosophy:\u003c\/strong\u003e Stealthy, reversible, reliability-focused upgrades that work in the real world.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Professional Footer --\u003e\n\u003cdiv style=\"margin-top: 40px; background: #000; color: #fff; padding: 22px; text-align: center; font-size: 14px; border-radius: 6px;\"\u003eOur M278 upgrades are designed, tested, and refined by people who live and breathe these cars — ensuring performance you can feel, and reliability you can trust.\u003c\/div\u003e\n\u003c!-- SEO Tag Injection (hidden) --\u003e \u003cspan style=\"display: none;\"\u003e M278 intake spacer, M278 performance upgrade, Mercedes 4.7 biturbo airflow mod, E550 intake spacer, CLS550 intake mod, S550 airflow upgrade, GL550 performance, GLS550 intake upgrade, ML550 airflow mod, GLE550 intake upgrade, turbo blanket M278, M278 tuning, BenzUnited M278 upgrades \u003c\/span\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46284250808495,"sku":null,"price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/m157-intake-airbox-filter-spacer-top-view.png?v=1770786858"},{"product_id":"m278-amg-aluminum-intake-tubes-w212-w218-e550-cls550-upgrade-kit","title":"M278 Aluminum Intake Tubes – W212 W218 E550 CLS550 Upgrade Kit","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 900px; margin: auto; line-height: 1.65; color: #222; font-size: 16px;\"\u003e\n\u003c!-- Lead --\u003e\n\u003cp\u003e\u003cstrong\u003eLet your M278 4.7L V8 BiTurbo breathe the way it was meant to.\u003c\/strong\u003e These CNC-bent \u003cstrong\u003eAluminum Intake Tubes\u003c\/strong\u003e replace the restrictive OEM plastic pipes on \u003cstrong\u003eW212 \/ W218 \/ W207 \/ C207 550 models\u003c\/strong\u003e—improving airflow, throttle response, and turbo efficiency while keeping a clean OEM+ engine bay appearance.\u003c\/p\u003e\n\u003c!-- Why They Matter --\u003e\n\u003cp style=\"margin-top: 10px;\"\u003eThe stock plastic intake tubes on the \u003cstrong\u003eM278 4.7L V8\u003c\/strong\u003e were built for refinement, not maximum flow. Under heat and boost, they can soften and distort, disrupting airflow before the turbochargers. These aluminum tubes give your E 550, CLS 550, or E-Class coupe\/cabriolet a smoother, more efficient inlet path that supports tuning, harder driving, and repeatable performance.\u003c\/p\u003e\n\u003c!-- Key Features --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e🔥 Key Features – M278 Aluminum Intake Tubes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-flow aluminum construction:\u003c\/strong\u003e Rigid tubing that won’t crack, flex, or deform under heat and boost like aged plastic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmoother turbo inlet airflow:\u003c\/strong\u003e Reduces turbulence and pressure drop before the turbos for more efficient operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotorsport-grade silicone couplers:\u003c\/strong\u003e Heat-resistant and boost-rated for stock or tuned M278 applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect-fit engineering:\u003c\/strong\u003e Designed around factory airboxes and turbo inlets—no cutting or permanent modifications required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Cerakote thermal finish:\u003c\/strong\u003e Helps control radiant heat and improve intake air temperature stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM+ stealth appearance:\u003c\/strong\u003e Clean routing that blends perfectly into the engine bay of any E 550 or CLS 550.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Benefits --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e📈 Real-World Performance Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper throttle response:\u003c\/strong\u003e Faster, more stable airflow as you roll into boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStronger midrange torque:\u003c\/strong\u003e Better volumetric efficiency where the 4.7L biturbo engine makes its power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore consistent performance:\u003c\/strong\u003e Less heat soak and smoother airflow for repeatable acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports tuning and bolt-ons:\u003c\/strong\u003e Ideal for ECU tunes, intake spacers, high-flow filters, and cooling upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Compatibility Table --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e✔️ Compatibility – M278 4.7L BiTurbo (Non-AMG)\u003c\/h3\u003e\n\u003cp\u003eDirect fit for the following Mercedes-Benz 550 models equipped with the \u003cstrong\u003eM278 4.7L V8 Biturbo\u003c\/strong\u003e:\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 10px 0px 14px; font-size: 15px; height: 123.75px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: rgb(242, 242, 242); height: 24.75px;\"\u003e\n\u003cth style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; text-align: left; height: 24.75px;\"\u003eChassis\u003c\/th\u003e\n\u003cth style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; text-align: left; height: 24.75px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; text-align: left; height: 24.75px;\"\u003eYears (Approx.)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 24.75px;\"\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003eW212\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003eE 550 Sedan\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003e2012–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.75px;\"\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003eW218\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003eCLS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003e2012–2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.75px;\"\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003eW207\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003eE 550 Coupe \/ Cabriolet\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid rgb(221, 221, 221); padding: 8px; height: 24.75px;\"\u003e2012–2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e🧰 Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect bolt-on replacement for OEM plastic intake tubes.\u003c\/li\u003e\n\u003cli\u003eInstall time: ~45–90 minutes with basic hand tools.\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM airboxes and high-flow panel filters.\u003c\/li\u003e\n\u003cli\u003eNo tune required—works with stock ECU calibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Included --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e📦 What’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLeft \u0026amp; right CNC-bent aluminum intake tubes (M278-specific)\u003c\/li\u003e\n\u003cli\u003eHigh-temp silicone couplers\u003c\/li\u003e\n\u003cli\u003eStainless T-bolt clamps\u003c\/li\u003e\n\u003cli\u003eOptional Cerakote thermal coating (if selected)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Recommended Pairings --\u003e\n\u003cdiv style=\"margin-top: 20px; padding: 14px 16px; border-radius: 8px; border: 1px solid #eee; background: #f7f7f7;\"\u003e\n\u003cp style=\"margin: 0 0 8px;\"\u003e\u003cstrong\u003eRecommended supporting mods for M278 builds:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin: 0 0 4px 18px;\"\u003e\n\u003cli\u003e\u003ca style=\"color: #000; font-weight: bold; text-decoration: none;\" href=\"\/products\/m278-intake-filter-spacer-kit\"\u003eM278 Intake Filter Spacer Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color: #000; font-weight: bold; text-decoration: none;\" href=\"\/products\/custom-ecu-tuning-m278-4-7-biturbo\"\u003eCustom ECU Tuning for M278 4.7L BiTurbo\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color: #000; font-weight: bold; text-decoration: none;\" href=\"\/products\/m278-turbo-blankets\"\u003eM278 Turbo Blankets \u0026amp; Heat Management\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Technical Airflow Summary --\u003e\n\u003ch3 style=\"margin-top: 24px;\"\u003e🔧 Technical Summary: Airflow \u0026amp; Turbo Efficiency\u003c\/h3\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eThe M278’s OEM intake tract includes abrupt angles and restriction points where the plastic tubes meet the airbox and turbos. Under higher airflow or tuning, this increases pressure drop and makes the turbochargers work harder to achieve the same boost.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eThese aluminum tubes offer smoother-radius transitions and a consistent internal diameter, reducing turbulence and stabilizing airflow. The result: more efficient boost, improved mass airflow readings, and noticeably crisper throttle response.\u003c\/p\u003e\n\u003c!-- Trust \/ Brand Section --\u003e\n\u003ch3 style=\"margin-top: 26px;\"\u003e🏁 Built \u0026amp; Tested by BenzUnited\u003c\/h3\u003e\n\u003cp style=\"margin-top: 0;\"\u003eWe’ve spent over \u003cstrong\u003e12 years\u003c\/strong\u003e daily-driving, tuning, and refining Mercedes-Benz 550 and AMG platforms. Every upgrade we produce is tested in-house across real mileage, real heat, and real boost—not just theoretical dyno curves. That’s why our hardware fits, lasts, and performs where it matters: on the road.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46284912459951,"sku":null,"price":275.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/w212-w218-m278-aluminum-intake-tubes-installed-engine-bay.jpg?v=1763430626"},{"product_id":"5-piece-idler-pulley-set-billet-upgrade-for-m278-v8-bi-turbo","title":"5-Piece Idler Pulley Set – Billet Upgrade for M278 V8 Bi-Turbo","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 900px; margin: auto; line-height: 1.65; color: #222; font-size: 16px;\"\u003e\n\u003c!-- Lead --\u003e\n\u003cp\u003eRestore and upgrade the belt system on your \u003cstrong\u003eM278 4.7L BiTurbo V8\u003c\/strong\u003e with this complete \u003cstrong\u003e5-Piece Billet Aluminum Idler Pulley Set\u003c\/strong\u003e. The factory plastic and aging stamped-steel pulleys on the E 550, CLS 550, S 550, SL 550, and other M278-equipped models are prone to wear, noise, and failure—especially as mileage rises or when the engine is tuned. This kit replaces them with \u003cstrong\u003eCNC-machined billet pulleys\u003c\/strong\u003e engineered for reliability, smooth operation, and long-term durability.\u003c\/p\u003e\n\u003c!-- Why It Matters --\u003e\n\u003cp style=\"margin-top: 10px;\"\u003eThe OEM idler pulleys on the \u003cstrong\u003eM278 4.7L V8 BiTurbo\u003c\/strong\u003e develop play, bearing noise, belt slip, and wobble over time. On a twin-turbo V8, even minor belt irregularities can cause \u003cstrong\u003eboost inconsistencies, charging issues, accessory failures, or catastrophic belt breakage\u003c\/strong\u003e. Upgrading to billet aluminum eliminates these weak points and stabilizes the engine’s entire accessory drive system.\u003c\/p\u003e\n\u003c!-- Key Features --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e🔧 Key Features – Billet Idler Pulley Set for M278\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC-machined 6061-T6 billet aluminum:\u003c\/strong\u003e Significantly stronger than OEM plastic or steel pulleys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard-anodized surface:\u003c\/strong\u003e Provides corrosion resistance and long-term bearing stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium high-speed bearings:\u003c\/strong\u003e Quiet, smooth rotation with improved temperature tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull 5-piece belt path refresh:\u003c\/strong\u003e Replaces all major M278 idlers for a complete system overhaul.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect bolt-on installation:\u003c\/strong\u003e Fits in place of factory pulleys with no modifications required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves belt tracking:\u003c\/strong\u003e Reduces slip at higher loads and improves boost consistency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e Precision-manufactured to motorsport-grade tolerances.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Performance \u0026 Reliability Benefits --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e📈 Performance \u0026amp; Reliability Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates OEM pulley failure points\u003c\/strong\u003e that become common past 60k–100k miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces belt noise, squeal, and vibration\u003c\/strong\u003e for smoother accessory operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports tuned M278 engines\u003c\/strong\u003e running increased boost or upgraded coolers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStabilizes boost control\u003c\/strong\u003e by preventing belt slip under acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtends belt life\u003c\/strong\u003e by using precise billet alignment and higher-quality bearings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- What's Included --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e📦 What’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e(5) CNC-machined billet aluminum idler pulleys (complete M278 set)\u003c\/li\u003e\n\u003cli\u003ePre-installed high-speed performance bearings\u003c\/li\u003e\n\u003cli\u003eOEM-spec mounting hardware (as required)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Compatibility Table --\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003e✔️ Compatibility – M278 4.7L V8 BiTurbo\u003c\/h3\u003e\n\u003cp\u003eFits the following Mercedes-Benz models equipped with the \u003cstrong\u003eM278 4.7L BiTurbo V8\u003c\/strong\u003e:\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 10px 0 14px; font-size: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eChassis\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\"\u003eYears (Approx.)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eW212\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eE 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2012–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eW218\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eCLS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2012–2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eW221 \/ W222\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2011–2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eR231\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eSL 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2013–2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eX166\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eGL 550 \/ GLS 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2013–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eW166\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eML 550 \/ GLE 550\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2012–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 13px; color: #555; margin: 0 0 12px;\"\u003e*Some markets vary. If you’re unsure whether your Mercedes uses the M278 engine, send us your \u003cstrong\u003eVIN\u003c\/strong\u003e and we’ll confirm fitment before shipping.\u003c\/p\u003e\n\u003c!-- Recommended Mods --\u003e\n\u003cdiv style=\"margin-top: 20px; padding: 14px 16px; border-radius: 8px; border: 1px solid #eee; background: #f7f7f7;\"\u003e\n\u003cp style=\"margin: 0 0 8px;\"\u003e\u003cstrong\u003eRecommended supporting upgrades for the M278 4.7L BiTurbo:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin: 0 0 4px 18px;\"\u003e\n\u003cli\u003e\u003ca href=\"\/products\/m278-aluminum-intake-tubes\" style=\"color: #000; font-weight: bold; text-decoration: none;\"\u003e M278 Aluminum Intake Tubes \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/m278-intake-filter-spacer-kit\" style=\"color: #000; font-weight: bold; text-decoration: none;\"\u003e M278 Intake Filter Spacer Kit \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/custom-ecu-tuning-m278-4-7-biturbo\" style=\"color: #000; font-weight: bold; text-decoration: none;\"\u003e Custom ECU Tuning for M278 4.7L BiTurbo \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/m278-turbo-blankets\" style=\"color: #000; font-weight: bold; text-decoration: none;\"\u003e M278 Turbo Blankets \u0026amp; Heat Management \u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Installation --\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003e🧰 Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect bolt-on replacement for all M278 idler pulley locations.\u003c\/li\u003e\n\u003cli\u003eTypical install time: 1–2 hours.\u003c\/li\u003e\n\u003cli\u003eNo tuning or reprogramming required.\u003c\/li\u003e\n\u003cli\u003eWorks with OEM and upgraded belt configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Trust Section --\u003e\n\u003ch3 style=\"margin-top: 26px;\"\u003e🏁 Designed, Tested \u0026amp; Proven on M278 Platforms\u003c\/h3\u003e\n\u003cp style=\"margin-top: 0;\"\u003eWith over \u003cstrong\u003e12 years\u003c\/strong\u003e of hands-on experience tuning and daily-driving Mercedes-Benz V8 BiTurbo engines, we know exactly where the M278 benefits from stronger hardware. This pulley set is built to meet the demands of real-world heat, boost, and mileage—offering a durable solution that improves reliability and performance across all 4.7L BiTurbo platforms.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46285619953839,"sku":null,"price":540.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/5-piece-idler-pulley-set-m278-billet-upgrade.jpg?v=1763435434"},{"product_id":"m278-turbo-blankets-heat-shield-upgrade-for-e550-cls550-s550","title":"M278 Turbo Blankets – Heat Shield Upgrade for E550 CLS550 S550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 850px; margin: auto; padding: 20px; background-color: #f9f9f9; border: 1px solid #ddd; color: #333;\"\u003e\n\u003ch2 style=\"color: #003366; text-align: center;\"\u003eReduce Heat Soak \u0026amp; Improve Turbo Response on Your Mercedes-Benz\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7;\"\u003eUnlock consistent, repeatable performance from your \u003cstrong\u003eMercedes-Benz M278 4.7L BiTurbo\u003c\/strong\u003e with our premium \u003cstrong\u003eM278 Turbo Blankets\u003c\/strong\u003e. Engineered specifically for the twin-turbo 550 platform, these blankets retain heat inside the turbine housing to improve spool, reduce under-hood temperatures, and protect surrounding components under high load.\u003c\/p\u003e\n\u003ch3 style=\"color: #003366;\"\u003e🔥 Key Benefits\u003c\/h3\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.7; margin-left: 18px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 60% reduction in radiant heat\u003c\/strong\u003e for lower IATs and more stable power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved turbo response\u003c\/strong\u003e by retaining exhaust energy inside the turbine housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced heat soak\u003c\/strong\u003e to charge-coolers, wiring, vacuum lines, and nearby engine components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore reliable performance\u003c\/strong\u003e during repeated acceleration or high-temperature conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced long-term durability\u003c\/strong\u003e thanks to significantly lower engine bay temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium construction:\u003c\/strong\u003e volcanic rock fiber exterior (1800°F direct \/ 2500°F radiant), stainless mesh reinforcement, and CMS wool insulation (1832°F continuous).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #003366;\"\u003e🚗 Vehicle Fitment – M278 4.7L BiTurbo (550 Series)\u003c\/h3\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.7; margin-left: 18px;\"\u003e\n\u003cli\u003eMercedes-Benz S550 (2011–2017)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz CL550 (2011–2014)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz CLS550 (2012–2018)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz E550 (2012–2016)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz ML550 (2012–2015)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz GLE550 (2016–2019)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz GL550 (2012–2015)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz GLS550 (2016–2019)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #003366;\"\u003e💡 Why Upgrade?\u003c\/h3\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7;\"\u003eTurbo blankets are one of the most effective, low-cost upgrades for the \u003cstrong\u003eM278 BiTurbo\u003c\/strong\u003e platform. By containing heat within the turbine housing, exhaust velocity remains high—improving turbo efficiency and reducing heat soak across the engine bay. This results in \u003cstrong\u003elower intake temperatures, faster turbo response, and improved long-term reliability\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"background-color: #eef3f8; border-left: 4px solid #003366; padding: 16px; margin-top: 20px; text-align: center;\"\u003e\n\u003cstrong\u003eMaximize your Mercedes-Benz 550’s performance.\u003c\/strong\u003e Reduce heat, protect components, and unlock consistent power with the \u003cem\u003eM278 Turbo Blanket Upgrade\u003c\/em\u003e.\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; margin-top: 25px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/products\/m278-turbo-blankets\" style=\"background-color: #004aad; color: #fff; padding: 12px 22px; border-radius: 6px; text-decoration: none; font-size: 16px; font-weight: bold;\"\u003eMore M278 Performance Mods \u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46293412184239,"sku":null,"price":245.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/m278-turbo-blankets-heat-shield-upgrade.png?v=1763520517"},{"product_id":"m278-2-piece-billet-aluminum-pulley-set-for-mercedes-e550-cls550","title":"M278 2 Piece Billet Aluminum Pulley Set for Mercedes E550 CLS550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #111; max-width: 850px; margin: auto; line-height: 1.6;\"\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision. Power. Reliability.\u003c\/strong\u003e Optimize your Mercedes-Benz 550-series BiTurbo with the \u003cstrong\u003e2 Piece Billet Aluminum Pulley Set\u003c\/strong\u003e, engineered specifically for the \u003cstrong\u003eM278 4.7L V8\u003c\/strong\u003e. This upgrade improves belt stability, reduces drag, and delivers smoother, more responsive performance for both street and track-driven 550 models.\u003c\/p\u003e\n\u003cdiv style=\"background: #f2f5f8; border-left: 4px solid #002b5b; padding: 15px; margin: 20px 0;\"\u003e\n\u003cstrong\u003eCrafted from aerospace-grade billet aluminum\u003c\/strong\u003e and finished with a \u003cstrong\u003ehard anodized coating\u003c\/strong\u003e, these pulleys are built to withstand the heat, load, and demands of the M278 twin-turbo platform.\u003c\/div\u003e\n\u003ch2 style=\"color: #002b5b;\"\u003e🔧 Key Performance Advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Strength Billet Construction:\u003c\/strong\u003e CNC-machined for exceptional rigidity and reduced rotational mass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard Anodized Finish:\u003c\/strong\u003e Corrosion- and heat-resistant coating ensures long-term longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Nachi Bearings:\u003c\/strong\u003e Premium ZZ-rated bearings deliver quiet, ultra-smooth operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Belt Tracking:\u003c\/strong\u003e Maintains stable RPM and belt alignment under boost and heavy load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Bolt-On Design:\u003c\/strong\u003e Installs using OEM brackets with perfect factory alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e Precision-engineered for Mercedes-Benz 4.7L BiTurbo applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #002b5b;\"\u003e🚘 Vehicle Compatibility — M278 4.7L BiTurbo\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2012–2016 Mercedes-Benz E 550\u003c\/li\u003e\n\u003cli\u003e2012–2018 Mercedes-Benz CLS 550\u003c\/li\u003e\n\u003cli\u003e2011–2017 Mercedes-Benz S 550\u003c\/li\u003e\n\u003cli\u003e2011–2014 Mercedes-Benz CL 550\u003c\/li\u003e\n\u003cli\u003e2013–2015 Mercedes-Benz GL 550\u003c\/li\u003e\n\u003cli\u003e2016–2019 Mercedes-Benz GLS 550\u003c\/li\u003e\n\u003cli\u003e2012–2015 Mercedes-Benz ML 550\u003c\/li\u003e\n\u003cli\u003e2016–2019 Mercedes-Benz GLE 550\u003c\/li\u003e\n\u003cli\u003e2013–2018 Mercedes-Benz SL 550\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #002b5b;\"\u003e🔥 Performance \u0026amp; Reliability\u003c\/h2\u003e\n\u003cp\u003eThis upgraded \u003cstrong\u003e2-piece pulley system\u003c\/strong\u003e reduces parasitic loss, improves belt grip, and increases stability during high-boost operation. Expect sharper throttle response, smoother revs, and more consistent performance—especially on tuned or hard-driven M278 vehicles.\u003c\/p\u003e\n\u003cp\u003ePremium \u003cstrong\u003eNachi high-speed bearings\u003c\/strong\u003e eliminate belt noise and prevent premature wear. Precision balancing ensures zero vibration, even at redline, while the hard anodized coating withstands the extreme heat of the M278’s turbochargers.\u003c\/p\u003e\n\u003ch2 style=\"color: #002b5b;\"\u003e🛠️ Installation Made Simple\u003c\/h2\u003e\n\u003cp\u003eDesigned to bolt directly to OEM locations, this pulley set installs in under an hour using basic tools. No cutting, grinding, or modification required.\u003c\/p\u003e\n\u003cdiv style=\"background: #eef3f7; border: 1px solid #c9d8e8; padding: 18px; margin: 25px 0; border-radius: 6px;\"\u003e\n\u003ch3 style=\"color: #002b5b; margin-top: 0;\"\u003e🏁 Why Choose BenzUnited Performance?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered specifically for M278 BiTurbo reliability \u0026amp; efficiency\u003c\/li\u003e\n\u003cli\u003eTested on real 550-series builds: street, tuned, and track-driven\u003c\/li\u003e\n\u003cli\u003eUSA-manufactured billet components built for longevity\u003c\/li\u003e\n\u003cli\u003eEach pulley is individually inspected, balanced, and finished\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color: #002b5b;\"\u003e📊 Technical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC-Machined Billet Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Hard Anodized (Matte Black or Silver)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e ZZ-Rated Nachi High-Speed Bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e M278 4.7L BiTurbo Only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #002b5b;\"\u003e💥 The M278 Advantage\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBenzUnited 2 Piece Billet Pulley Set\u003c\/strong\u003e delivers measurable improvements in smoothness, response, and long-term drivetrain reliability. Whether your 550 is stock, tuned, or fully modified, this upgrade provides performance you can feel every time you hit the throttle.\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-top: 30px;\"\u003e\u003ca href=\"#add-to-cart\" style=\"background: #002b5b; color: #fff; padding: 14px 22px; border-radius: 6px; text-decoration: none; font-weight: bold; font-size: 16px; display: inline-block;\"\u003e ⚙️ More M278 Performance Mods \u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46294269001903,"sku":null,"price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/m278-billet-pulley-set-cnc-performance-upgrade.jpg?v=1763530311"},{"product_id":"m278-billet-polyurethane-engine-mounts-e550-cls550","title":"M278 Billet Polyurethane Engine Mounts – E550 \/ CLS550","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 880px; margin: auto; padding: 22px; border: 1px solid #e5e7eb; background: #fafafa; color: #1a1a1a; line-height: 1.7; border-radius: 10px;\"\u003e\n\u003c!-- TITLE \/ HOOK --\u003e\n\u003ch1 style=\"text-align: center; font-size: 26px; margin: 0 0 8px; color: #0b3b60;\"\u003eBillet \/ Polyurethane Engine Mounts for Mercedes M278 (W212 \/ W218)\u003c\/h1\u003e\n\u003cp style=\"text-align: center; margin: 0 0 18px; color: #475569;\"\u003eReduce drivetrain motion • Sharpen throttle response • Improve power delivery\u003c\/p\u003e\n\u003c!-- INTRO --\u003e\n\u003cp\u003eUpgrade your \u003cstrong\u003eMercedes-Benz M278 4.7L BiTurbo\u003c\/strong\u003e with our \u003cstrong\u003eBillet \/ Polyurethane Engine Mounts\u003c\/strong\u003e. Designed specifically for the \u003cstrong\u003eW212 E 550\u003c\/strong\u003e and \u003cstrong\u003eW218 CLS 550\u003c\/strong\u003e, these mounts deliver superior engine control, sharper response, and consistent power transfer under load — ideal for tuned or spiritedly driven 550 builds.\u003c\/p\u003e\n\u003cp\u003eFactory fluid-filled mounts on M278 cars \u003cstrong\u003esag, leak, and collapse with age\u003c\/strong\u003e, especially on tuned cars or those driven hard. The result is excess engine movement, sloppy shifts, and vibration under throttle. These billet\/poly mounts eliminate that failure point with a rigid housing and high-durometer insert that keep everything locked in place.\u003c\/p\u003e\n\u003c!-- KEY BENEFITS --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 18px;\"\u003e⚙️ Key Benefits\u003c\/h2\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eStability \u0026amp; Control:\u003c\/strong\u003e Reduces engine movement and drivetrain lash for sharper throttle response and cleaner shifts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable by Design:\u003c\/strong\u003e Billet aluminum housings and high-durometer polyurethane resist heat, oil, and deformation far better than OEM fluid-filled mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Torque Transfer:\u003c\/strong\u003e Keeps the drivetrain aligned under boost so more of the M278’s torque reaches the rear wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Geometry:\u003c\/strong\u003e Prevents the front end from “sagging” as mounts age, helping maintain proper driveline and exhaust alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect-Fit Upgrade:\u003c\/strong\u003e Engineered around factory mount geometry for a precise, bolt-in installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- FITMENT --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 22px;\"\u003e✅ Vehicle Fitment — M278 (W212 \/ W218)\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 8px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #0b3b60; color: #fff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eEngine\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e5e7eb; text-align: left;\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eE 550 (W212)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eM278 4.7L BiTurbo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003e2012–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eCLS 550 (W218)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003eM278 4.7L BiTurbo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e5e7eb;\"\u003e2012–2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 13px; color: #64748b; margin-top: 8px;\"\u003e\u003cem\u003eFitment is exclusive to the W212 and W218 M278 platforms. Contact us with your VIN if you’re unsure.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- WHAT'S INCLUDED \/ INSTALL --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 22px;\"\u003e📦 What’s Included \u0026amp; Install Notes\u003c\/h2\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eLeft + Right \u003cstrong\u003eBillet \/ Polyurethane Engine Mounts\u003c\/strong\u003e for M278 W212\/W218.\u003c\/li\u003e\n\u003cli\u003eReuse the \u003cstrong\u003eOEM top cap\u003c\/strong\u003e (pops off the factory mount with a small screwdriver).\u003c\/li\u003e\n\u003cli\u003eDirect-fit design matches factory geometry for proper drivetrain and exhaust alignment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 14px; color: #475569;\"\u003e\u003cem\u003eProfessional installation recommended. Torque all fasteners to factory specification and verify downpipe, subframe, and steering rack clearance after installation.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- FAQ --\u003e\n\u003ch2 style=\"color: #0b3b60; margin-top: 22px;\"\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 10px;\"\u003e\n\u003csummary\u003e\u003cstrong\u003eWill these increase NVH?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp style=\"margin-top: 6px;\"\u003eCompared to soft OEM fluid-filled mounts, you may notice a slight increase in vibration at idle or low RPM. Under load, most drivers prefer the added precision, improved drivetrain feel, and reduction in “slop” when getting on and off throttle.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px;\"\u003e\n\u003csummary\u003e\u003cstrong\u003eAre these mounts suitable for tuned or high-boost M278 cars?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp style=\"margin-top: 6px;\"\u003eYes. The billet housings and high-durometer polyurethane inserts are designed to handle the elevated torque, heat, and repeated load cycles typical of tuned W212\/W218 M278 builds.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px;\"\u003e\n\u003csummary\u003e\u003cstrong\u003eDo I need new hardware?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp style=\"margin-top: 6px;\"\u003eOEM hardware may be reused if it’s in good condition. Replace any stretched, corroded, or damaged bolts and always follow factory torque and angle specs.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c!-- CTA --\u003e\n\u003cdiv style=\"text-align: center; margin-top: 24px;\"\u003e\u003ca href=\"\/collections\/m278\" style=\"display: inline-block; background: #0b3b60; color: #fff; padding: 12px 22px; border-radius: 8px; text-decoration: none; font-weight: bold;\"\u003e 🔧 Shop M278 Performance Parts \u003c\/a\u003e\u003c\/div\u003e\n\u003c!-- SEO FOOTER LINE --\u003e\n\u003cp style=\"text-align: center; font-size: 13px; color: #64748b; margin-top: 18px;\"\u003ePerformance engine mounts for Mercedes E 550 \u0026amp; CLS 550 — W212 \/ W218 M278 4.7L BiTurbo.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46294562242735,"sku":null,"price":495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/billet-polyurethane-engine-mounts-mercedes-m278-e550-cls550-benzunited.jpg?v=1763534145"},{"product_id":"mercedes-benz-m278-intake-filter-spacer-kit-4-7l-v8-biturbo-e550-cls550-s550-sl550-copy","title":"M278 OEM+ Intake Kit – Airbox Spacer + High-Flow Filters (4.7L BiTurbo Mercedes V8)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 900px; margin: 0 auto; line-height: 1.65; color: #222; font-size: 16px;\"\u003e\n\u003c!-- LEAD \/ HOOK --\u003e\n\u003cp\u003e\u003cstrong\u003eImprove airflow where the M278 actually needs it.\u003c\/strong\u003e This \u003cstrong\u003eM278 OEM+ Intake Kit\u003c\/strong\u003e combines a precision \u003cstrong\u003eairbox spacer\u003c\/strong\u003e with \u003cstrong\u003ehigh-flow drop-in filters\u003c\/strong\u003e to reduce restriction inside the factory airbox, sharpen throttle response, and maintain consistent performance under heat — all while retaining the OEM intake layout.\u003c\/p\u003e\n\u003cp\u003eDesigned for the \u003cstrong\u003e4.7L M278 BiTurbo V8\u003c\/strong\u003e, this kit targets an internal airbox bottleneck that becomes more noticeable on tuned or aggressively driven vehicles.\u003c\/p\u003e\n\u003c!-- WHY IT WORKS --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003eWhy This OEM+ Intake Kit Works\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirbox Spacer Upgrade:\u003c\/strong\u003e Raises the filter sealing surface to reduce restriction and smooth airflow entering the intake tract.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flow Drop-In Filters:\u003c\/strong\u003e Improved airflow over OEM paper elements while maintaining proper filtration and MAF stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Airbox Retained:\u003c\/strong\u003e Preserves factory cold-air routing and heat shielding — no heat soak issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeatable Performance:\u003c\/strong\u003e Designed for consistency pull after pull, not inflated dyno numbers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- PERFORMANCE EXPECTATIONS --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003ePerformance Expectations\u003c\/h3\u003e\n\u003cp\u003eThis kit focuses on \u003cstrong\u003eairflow efficiency and drivability\u003c\/strong\u003e, not exaggerated peak horsepower claims.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSharper throttle response\u003c\/li\u003e\n\u003cli\u003eImproved mid-range airflow consistency\u003c\/li\u003e\n\u003cli\u003eBetter performance repeatability under heat\u003c\/li\u003e\n\u003cli\u003eMore airflow headroom for tuned M278 setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNo tuning required.\u003c\/strong\u003e Fully compatible with factory ECU calibration.\u003c\/p\u003e\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e(2) Precision airbox spacers (left + right)\u003c\/li\u003e\n\u003cli\u003eAll required mounting hardware\u003c\/li\u003e\n\u003cli\u003e(2) High-flow drop-in performance air filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- FITMENT TABLE --\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eVehicle Fitment – M278 4.7L BiTurbo V8\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 10px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eChassis\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eS 550 \/ S 560\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eW222\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2014–2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eS 550\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eW221\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2012–2013\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eE 550\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eW212\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2012–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCLS 550\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eW218\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2012–2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eGL 450 \/ GL 550\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eX166\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2013–2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eGLS 450 \/ GLS 550\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eX166\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2016–2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eML 450 \/ ML 550\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eW166\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2012–2015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 14px; color: #555; margin-top: 10px;\"\u003e\u003cem\u003eConfirm engine code and model year before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- INSTALL --\u003e\n\u003ch3 style=\"margin-top: 18px;\"\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTypical install time: ~20 minutes\u003c\/li\u003e\n\u003cli\u003eUses factory mounting points\u003c\/li\u003e\n\u003cli\u003eNo cutting, no tuning, fully reversible\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- CLOSING --\u003e\n\u003cp style=\"margin-top: 18px;\"\u003eIdeal for daily-driven M278 vehicles and tuned builds looking for \u003cstrong\u003erepeatable real-world performance\u003c\/strong\u003e without sacrificing OEM reliability or intake temperature control.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46493194649775,"sku":null,"price":325.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/m278-oem-intake-spacer-kit-with-afe-filters.png?v=1768789407"},{"product_id":"blow-off-valve-kit-for-mercedes-amg-m157-amp-m278-turbo-protection-upgrade","title":"Turbo Pressure Relief Kit for E550 \u0026 CLS550 | M278 V8 Biturbo","description":"\u003cdiv style=\"max-width: 900px; margin: auto; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color: #222; line-height: 1.65;\"\u003e\n\u003cp\u003eProtect your turbochargers and upgrade your forced-induction system with the \u003cstrong\u003eTurbo Pressure Relief Kit\u003c\/strong\u003e, engineered specifically for \u003cstrong\u003eMercedes-AMG M278 twin-turbo V8 engines\u003c\/strong\u003e. This precision-designed kit helps prevent \u003cstrong\u003ecompressor surge\u003c\/strong\u003e, reducing stress on turbochargers and supporting long-term reliability—especially on tuned or aggressively driven vehicles.\u003c\/p\u003e\n\u003cp\u003eUnlike factory recirculation systems that can allow pressure backflow during throttle lift, this system safely releases excess charge air, helping protect turbo internals and maintain consistent boost behavior during rapid shifts and spirited driving.\u003c\/p\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eKey Features \u0026amp; Engineering Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-Mount Design:\u003c\/strong\u003e All current kits feature a \u003cstrong\u003eside-mounted pressure relief valve\u003c\/strong\u003e configuration for improved packaging and consistent operation (not center-mounted).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Turbo Protection:\u003c\/strong\u003e Relieves excess boost pressure to reduce compressor surge and minimize turbocharger stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM278-Specific Design:\u003c\/strong\u003e Optimized for the airflow characteristics and operating demands of the M278 twin-turbo platform.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eComplete Kit Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModified charge pipes\u003c\/li\u003e\n\u003cli\u003eCustom silicone 90° elbow\u003c\/li\u003e\n\u003cli\u003e38mm pressure relief (blow-off) valve\u003c\/li\u003e\n\u003cli\u003eMAP sensor tap\u003c\/li\u003e\n\u003cli\u003eVacuum lines and required installation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eFactory Integration\u003c\/h3\u003e\n\u003cp\u003eThis kit is designed to retain the \u003cstrong\u003efactory AMG engine cover\u003c\/strong\u003e. Minor modification to the engine cover mounting bracket is required to ensure proper clearance and fitment.\u003c\/p\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eApproximate \u003cstrong\u003e2-week preparation time\u003c\/strong\u003e prior to shipping\u003c\/li\u003e\n\u003cli\u003eCutting of the engine cover mounting bracket is required\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for optimal results\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eVehicle Compatibility – M278 Engines\u003c\/h3\u003e\n\u003cp\u003eCompatible with Mercedes-Benz vehicles equipped with the \u003cstrong\u003eM278 twin-turbo V8 engine\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMercedes-Benz S550 (2011–2017)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz CL550 (2011–2014)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz CLS550 (2011–2018)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz E550 (2012–2014)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz ML550 (2012–2014)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz G63 AMG \u003cem\u003e(special order)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top: 18px;\"\u003eThis turbo pressure relief kit is a \u003cstrong\u003efunctional performance upgrade\u003c\/strong\u003e designed to support long-term turbocharger reliability and smoother boost transitions on M278-powered vehicles. It is especially beneficial for owners running aftermarket tuning or increased boost pressure.\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-top: 26px; font-weight: bold;\"\u003eUpgrade with confidence. Protect your turbos. Drive your M278-powered AMG the way it was meant to be driven.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"I'll send in my Original chargepipes after purchase (+ $200)","offer_id":46550103261359,"sku":null,"price":1349.0,"currency_code":"USD","in_stock":true},{"title":"I'll send the Original chargepipes before purchase","offer_id":46550103294127,"sku":null,"price":1149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/amg-m157-m278-turbo-pressure-relief-kit-charge-pipes-bov.jpg?v=1770660978"},{"product_id":"turbo-pressure-relief-kit-for-e550-cls550-m278-v8-biturbo-copy","title":"E63 \u0026 CLS63 AMG M157 Charge Pipes | Turbo Pressure Relief Kit","description":"\u003cdiv style=\"max-width: 900px; margin: auto; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color: #222; line-height: 1.65;\"\u003e\n\u003cp\u003eProtect your turbochargers and upgrade your forced-induction system with the \u003cstrong\u003eTurbo Pressure Relief Kit\u003c\/strong\u003e, engineered specifically for \u003cstrong\u003eMercedes-AMG M157 V8 Biturbo engines\u003c\/strong\u003e. This precision-designed kit helps prevent \u003cstrong\u003ecompressor surge\u003c\/strong\u003e, reducing stress on turbochargers and supporting long-term reliability—especially on tuned or aggressively driven AMG applications.\u003c\/p\u003e\n\u003cp\u003eUnlike factory recirculation systems that can allow pressure backflow during throttle lift, this system safely releases excess charge air, helping protect turbo internals and maintain consistent boost behavior during hard acceleration, rapid shifts, and spirited driving.\u003c\/p\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eKey Features \u0026amp; Engineering Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide-Mount Design:\u003c\/strong\u003e All current kits feature a \u003cstrong\u003eside-mounted pressure relief valve\u003c\/strong\u003e configuration for improved packaging and consistent operation (not center-mounted).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Turbo Protection:\u003c\/strong\u003e Relieves excess boost pressure to reduce compressor surge and minimize turbocharger stress under high-load conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM157-Specific Design:\u003c\/strong\u003e Optimized for the airflow demands and boost characteristics of the M157 twin-turbo AMG platform.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eComplete Kit Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModified charge pipes\u003c\/li\u003e\n\u003cli\u003eCustom silicone 90° elbow\u003c\/li\u003e\n\u003cli\u003e38mm pressure relief (blow-off) valve\u003c\/li\u003e\n\u003cli\u003eMAP sensor tap\u003c\/li\u003e\n\u003cli\u003eVacuum lines and required installation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eFactory Integration\u003c\/h3\u003e\n\u003cp\u003eThis kit is designed to retain the \u003cstrong\u003efactory AMG engine cover\u003c\/strong\u003e. Minor modification to the engine cover mounting bracket is required to ensure proper clearance and fitment.\u003c\/p\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eApproximate \u003cstrong\u003e2-week preparation time\u003c\/strong\u003e prior to shipping\u003c\/li\u003e\n\u003cli\u003eCutting of the engine cover mounting bracket is required\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for optimal results\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 22px;\"\u003eVehicle Compatibility – M157 Engines\u003c\/h3\u003e\n\u003cp\u003eCompatible with Mercedes-Benz vehicles equipped with the \u003cstrong\u003eM157 V8 BiTurbo engine\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMercedes-Benz E63 AMG (2012–2016)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz CLS63 AMG (2012–2018)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz S63 AMG (2011–2017)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz CL63 AMG (2011–2014)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz ML63 AMG (2012–2015)\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz G63 AMG \u003cem\u003e(special order)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top: 18px;\"\u003eThis turbo pressure relief kit is a \u003cstrong\u003efunctional performance upgrade\u003c\/strong\u003e designed to support long-term turbocharger reliability and smoother boost transitions on M157-powered AMG vehicles. It is especially beneficial for cars running aftermarket tuning or increased boost pressure.\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-top: 26px; font-weight: bold;\"\u003eUpgrade with confidence. Protect your turbos. Drive your M157-powered AMG the way it was meant to be driven.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"I'll send in my Original chargepipes after purchase (+ $200)","offer_id":46550107455663,"sku":null,"price":1349.0,"currency_code":"USD","in_stock":true},{"title":"I'll send the Original chargepipes before purchase","offer_id":46550107488431,"sku":null,"price":1149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/amg-m157-m278-turbo-pressure-relief-kit-charge-pipes-bov.jpg?v=1770660978"},{"product_id":"bilstein-b4-oe-replacement-front-left-air-strut-mercedes-s550-4matic-2014-2017","title":"Bilstein B4 OE Replacement Front Left Air Strut Mercedes S550 2014-2017","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #222; line-height: 1.7; max-width: 900px; margin: auto;\"\u003e\n\u003ch2 style=\"text-align: center; color: #b60000; margin-bottom: 20px;\"\u003eBilstein B4 OE Replacement Air Strut Front Left Mercedes S550 2014-2017 (Fits 4Matic models)\u003c\/h2\u003e\n\u003cp style=\"text-align: center; font-size: 1.15em; margin-bottom: 24px;\"\u003eGenuine Bilstein B4 OE Replacement Air Strut. Direct plug-and-play replacement that restores original ride comfort, handling, and smoothness to your Mercedes S550 with factory Airmatic suspension.\u003c\/p\u003e\n\u003cdiv style=\"background: #f9f9f9; border: 2px solid #ddd; padding: 22px; border-radius: 10px; margin: 28px 0;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #b60000; text-align: center;\"\u003eFitment Table\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 16px 0px; height: 47.6px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: rgb(240, 240, 240); height: 23.8px;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); text-align: left; height: 23.8px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); text-align: left; height: 23.8px;\"\u003eYears\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); text-align: left; height: 23.8px;\"\u003eDrivetrain\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); text-align: center; height: 23.8px;\"\u003ePosition\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 23.8px;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); height: 23.8px;\"\u003eMercedes-Benz S550 (W222)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); height: 23.8px;\"\u003e2014–2017\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); height: 23.8px;\"\u003e4MATIC\/RWD\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid rgb(221, 221, 221); text-align: center; height: 23.8px;\"\u003e\u003cstrong\u003eFront Left\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin: 0px; font-size: 0.95em; color: rgb(182, 0, 0); text-align: center;\"\u003e⚠️ This is for the \u003cstrong\u003eFront Left\u003c\/strong\u003e position and fits 4matic models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"margin-bottom: 28px; padding-left: 20px;\"\u003e\n\u003cli\u003eDirect OE replacement – plugs into original electrical connectors\u003c\/li\u003e\n\u003cli\u003eNo modifications or coding required\u003c\/li\u003e\n\u003cli\u003eMonotube design for consistent damping performance\u003c\/li\u003e\n\u003cli\u003eMultiple stud upper mount and clevis lower mount\u003c\/li\u003e\n\u003cli\u003eDurable black finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eManufactured to meet or exceed original equipment standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul style=\"margin-bottom: 28px; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Bilstein\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e B4 OE Replacement (Air)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Front Left\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper Mount:\u003c\/strong\u003e Multiple Studs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Mount:\u003c\/strong\u003e Clevis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Design:\u003c\/strong\u003e Monotube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoot Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 44-240004\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: center; font-size: 1.2em; font-weight: bold; color: #b60000; margin: 40px 0 10px;\"\u003eRestore the smooth, factory-like ride to your S550.\u003c\/p\u003e\n\u003cp style=\"text-align: center; font-size: 1.05em; color: #b60000;\"\u003e⚠️ Professional installation recommended. For vehicles with factory Airmatic suspension only.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46703821095087,"sku":null,"price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/bilstein-b4-front-left-air-strut-s550-2014-2017.webp?v=1774499230"},{"product_id":"bilstein-b4-oe-replacement-front-right-air-strut-mercedes-s550-4matic-2014-2017","title":"Bilstein B4 OE Replacement Front Right Air Strut Mercedes S550 4MATIC 2014-2017","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #222; line-height: 1.7; max-width: 900px; margin: auto;\"\u003e\n\u003ch2 style=\"text-align: center; color: #b60000; margin-bottom: 20px;\"\u003eBilstein B4 OE Replacement Air Strut Front Right Mercedes S550 2014-2017 (Fits 4Matic)\u003c\/h2\u003e\n\u003cp style=\"text-align: center; font-size: 1.15em; margin-bottom: 24px;\"\u003eRestore your factory ride quality with this Bilstein B4 OE Replacement Air Strut. Direct plug-and-play replacement for the Front Right position on your Mercedes-Benz S550 with Airmatic suspension.\u003c\/p\u003e\n\u003cdiv style=\"background: #f9f9f9; border: 2px solid #ddd; padding: 22px; border-radius: 10px; margin: 28px 0;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #b60000; text-align: center;\"\u003eFitment Table\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 16px 0;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #f0f0f0;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eYears\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: center;\"\u003e4MATIC\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: center;\"\u003ePosition\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eMercedes-Benz S550 (W222)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e2014–2017\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: center;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: center;\"\u003e\u003cstrong\u003eFront Right\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin: 0px; font-size: 0.95em; color: rgb(182, 0, 0); text-align: center;\"\u003e⚠️ This strut is for the \u003cstrong\u003eFront Right\u003c\/strong\u003e position and fits 4MATIC models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"margin-bottom: 28px; padding-left: 20px;\"\u003e\n\u003cli\u003eDirect OE replacement – plugs into original electrical connectors\u003c\/li\u003e\n\u003cli\u003eNo modifications or coding required\u003c\/li\u003e\n\u003cli\u003eMonotube design for consistent damping and performance\u003c\/li\u003e\n\u003cli\u003eMultiple stud upper mount and clevis lower mount\u003c\/li\u003e\n\u003cli\u003eDurable black finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eManufactured to meet or exceed original equipment standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul style=\"margin-bottom: 28px; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Bilstein\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e B4 OE Replacement (Air)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Front Right\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper Mount:\u003c\/strong\u003e Multiple Studs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Mount:\u003c\/strong\u003e Clevis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Design:\u003c\/strong\u003e Monotube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoot Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 44-240011\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: center; font-size: 1.2em; font-weight: bold; color: #b60000; margin: 40px 0 10px;\"\u003eRestore the smooth, luxurious factory ride to your S550.\u003c\/p\u003e\n\u003cp style=\"text-align: center; font-size: 1.05em; color: #b60000;\"\u003e⚠️ Professional installation recommended. For vehicles with factory Airmatic suspension only.\u003cbr\u003eCalifornia Proposition 65 Warning: Cancer \u0026amp; Reproductive Harm - www.P65Warnings.ca.gov\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46703833317551,"sku":null,"price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/bilstein-b4-front-right-air-strut-s550-2014-2017.webp?v=1774500899"},{"product_id":"bc-racing-ds-type-coilovers-mercedes-cls-class-w218-sedan-2012-2019-digressive-piston","title":"BC Racing DS Type Coilovers Mercedes CLS-Class W218 Sedan 2012-2019 - Digressive Piston","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #222; line-height: 1.7; max-width: 900px; margin: auto;\"\u003e\n\n  \u003ch2 style=\"text-align: center; color: #b60000; margin-bottom: 20px;\"\u003eBC Racing DS Type Coilovers Mercedes-Benz CLS-Class W218 Sedan 2012-2019\u003c\/h2\u003e\n\n  \u003cp style=\"text-align: center; font-size: 1.15em; margin-bottom: 24px;\"\u003e\n    Experience sharper handling and superior driver feedback with BC Racing DS Series Coilovers. \n    The DS Type features a proprietary \u003cstrong\u003edigressive piston design\u003c\/strong\u003e that provides firm low-speed damping for excellent body control while allowing smoother, more compliant response at higher speeds — ideal for spirited street driving, canyons, and track days.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background: #f9f9f9; border: 2px solid #ddd; padding: 22px; border-radius: 10px; margin: 28px 0; text-align: center;\"\u003e\n    \u003ch3 style=\"margin-top: 0; color: #b60000;\"\u003eFitment\u003c\/h3\u003e\n    \u003cp style=\"font-size: 1.1em; margin: 12px 0;\"\u003e\n      \u003cstrong\u003eMercedes-Benz CLS-Class W218 Sedan\u003c\/strong\u003e\u003cbr\u003e\n      2012 • 2013 • 2014 • 2015 • 2016 • 2017 • 2018 • 2019\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eWhat Are Digressive Shocks?\u003c\/h3\u003e\n  \u003cp\u003e\n    Unlike traditional linear shocks that apply consistent damping force, digressive shocks deliver \u003cstrong\u003ehigher damping force at low piston speeds\u003c\/strong\u003e (when the car is rolling, pitching, or making small weight transfers) and then taper off at higher speeds. \n    This gives you better chassis control and reduced body movement during cornering and braking, while still soaking up larger bumps comfortably.\n  \u003c\/p\u003e\n\n  \u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eSpring Rates \u0026amp; Handling Characteristics\u003c\/h3\u003e\n  \u003cp\u003e\n    This kit comes with \u003cstrong\u003e6kg\/mm front\u003c\/strong\u003e and \u003cstrong\u003e15kg\/mm rear\u003c\/strong\u003e springs as default. \n    The relatively soft front rate helps maintain good ride comfort and steering feel on the street, while the significantly stiffer rear rate reduces squat under acceleration and improves stability during hard cornering. \n    Overall, expect a sportier, more planted feel with reduced body roll compared to stock — without being overly harsh for daily driving.\n  \u003c\/p\u003e\n\n  \u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eKey Features\u003c\/h3\u003e\n  \u003cul style=\"margin-bottom: 28px; padding-left: 20px;\"\u003e\n    \u003cli\u003eProprietary digressive piston – superior low-speed control with compliant high-speed response\u003c\/li\u003e\n    \u003cli\u003e30 levels of simultaneous compression \u0026amp; rebound adjustment\u003c\/li\u003e\n    \u003cli\u003eHeight adjustment independent of spring compression (full damper travel retained)\u003c\/li\u003e\n    \u003cli\u003eMono-tube shock design with satin chrome finished body\u003c\/li\u003e\n    \u003cli\u003eFront camber plates included (rear camber plates available separately)\u003c\/li\u003e\n    \u003cli\u003eFully rebuildable design – compatible with custom rates and Swift springs\u003c\/li\u003e\n    \u003cli\u003e1-Year manufacturer warranty\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eDefault Spring Rates\u003c\/h3\u003e\n  \u003cul style=\"margin-bottom: 28px; padding-left: 20px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFront:\u003c\/strong\u003e 6 kg\/mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRear:\u003c\/strong\u003e 15 kg\/mm\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"margin: 32px 0 12px; color: #b60000;\"\u003eImportant Note\u003c\/h3\u003e\n  \u003cp\u003e\n    Optimal ride height and spring rates can vary depending on your specific CLS model (RWD vs 4MATIC), wheel\/tire setup, and intended use. \n    For the best setup recommendation, please contact our sales team before ordering.\n  \u003c\/p\u003e\n\n  \u003cp style=\"text-align: center; font-size: 1.2em; font-weight: bold; color: #b60000; margin: 40px 0 10px;\"\u003e\n    Transform your CLS W218 into a sharper, more responsive driver's car with BC Racing DS Coilovers.\n  \u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46703905177775,"sku":null,"price":1395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/bc-racing-ds-coilovers-mercedes-cls-w218-2012-2019.webp?v=1774502285"},{"product_id":"catless-downpipes-for-w222-mercedes-s550-m278-4-7l-v8-biturbo-2011-2017","title":"Catless Downpipes for Mercedes W222 C217 S550 - M278 4.7L V8 BiTurbo (2011–2017)","description":"\u003cdiv style=\"max-width: 1000px; margin: 0 auto; padding: 22px; font-family: ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif; color: #111; line-height: 1.6;\"\u003e\n\u003c!-- Fitment Badge --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; padding: 14px 16px; border: 1px solid #eaeaea; border-radius: 14px; background: #fafafa; margin-bottom: 16px;\"\u003e\n\u003cdiv style=\"font-weight: 800;\"\u003eCatless Downpipe Set\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444;\"\u003e\n\u003cstrong\u003eS550\u003c\/strong\u003e • M278 BiTurbo V8 • 2011–2017\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Title --\u003e\n\u003ch2 style=\"margin: 0 0 8px 0; font-size: 22px; letter-spacing: -0.3px;\"\u003e2011–2017 Mercedes-Benz S550 M278 Catless Downpipes\u003cbr\u003e\u003cspan style=\"font-size: 15px; color: #555; font-weight: 500;\"\u003eHigh-flow stainless downpipe set for M278 applications\u003c\/span\u003e\n\u003c\/h2\u003e\n\n\u003cp style=\"margin: 0 0 14px 0; color: #333;\"\u003eReduce exhaust restriction and improve turbo response with a \u003cstrong\u003ecatless downpipe set\u003c\/strong\u003e built for the \u003cstrong\u003e2011–2017 Mercedes-Benz S550 (M278 Bi-turbo V8, W222 sedan \u0026amp; C217 coupe chassis)\u003c\/strong\u003e. Designed to increase exhaust flow for faster spool and stronger mid-range response—especially when paired with proper ECU calibration. Owners commonly report noticeably quicker turbo spool-up and improved throttle response after installation.\u003c\/p\u003e\n\n\u003c!-- Trust \/ What You Get --\u003e\n\u003cdiv style=\"padding: 14px 16px; border: 1px solid #eaeaea; border-radius: 14px; background: #fff; box-shadow: 0 1px 0 rgba(0,0,0,0.02); margin-bottom: 18px;\"\u003e\n\u003cdiv style=\"font-weight: 800; margin-bottom: 6px;\"\u003eWhat’s Included\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444;\"\u003eComplete left\/right downpipe set (as pictured). Hardware\/gaskets are not included unless shown in photos.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Quick Specs --\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; margin-bottom: 18px;\"\u003e\n\u003cdiv style=\"border: 1px solid #eaeaea; border-radius: 14px; padding: 12px 14px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 12px; color: #666; margin-bottom: 4px;\"\u003eEngine\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 800;\"\u003eM278 Bi-Turbo V8\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #eaeaea; border-radius: 14px; padding: 12px 14px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 12px; color: #666; margin-bottom: 4px;\"\u003eChassis\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 800;\"\u003eS-Class (W222 sedan \u0026amp; C217 coupe)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #eaeaea; border-radius: 14px; padding: 12px 14px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 12px; color: #666; margin-bottom: 4px;\"\u003eType\u003c\/div\u003e\n\u003cdiv style=\"font-weight: 800;\"\u003eCatless \/ High-Flow\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Benefits --\u003e\n\u003ch3 style=\"margin: 18px 0 8px 0; font-size: 16px;\"\u003eWhy Upgrade the Factory Downpipes?\u003c\/h3\u003e\n\u003cul style=\"margin: 0 0 14px 18px; padding: 0; color: #333;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved exhaust flow:\u003c\/strong\u003e helps reduce backpressure for more efficient turbo operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper response:\u003c\/strong\u003e faster spool and stronger mid-range pull.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore aggressive sound:\u003c\/strong\u003e increases exhaust volume and tone (varies by setup).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- ECU Tune CTA --\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #eaeaea; border-radius: 14px; padding: 16px; margin: 16px 0; text-align: center;\"\u003e\n\u003cdiv style=\"font-weight: 900; font-size: 16px; margin: 0 0 6px; color: #111;\"\u003eRecommended Next Step: ECU Tuning\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #555; margin: 0 0 12px;\"\u003eA catless setup may trigger a check engine light without proper ECU calibration or sensor management.\u003c\/div\u003e\n\u003ca href=\"https:\/\/benzunitedparts.com\/products\/custom-ecu-tuning-for-e63-cls63\" style=\"display: inline-block; background: #111; color: #fff; padding: 12px 24px; border-radius: 8px; text-decoration: none; font-weight: 700; font-size: 15px; border: none; box-shadow: 0 2px 4px rgba(0,0,0,0.1); transition: all 0.2s ease;\"\u003eView ECU Tune Options\u003c\/a\u003e\n\u003cdiv style=\"font-size: 12px; color: #777; margin-top: 10px;\"\u003eIf you have a different platform\/tune listing for M278, link this button to that product instead.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Fitment --\u003e\n\u003ch3 style=\"margin: 16px 0 10px 0; font-size: 16px;\"\u003eFitment\u003c\/h3\u003e\n\u003cdiv style=\"border: 1px solid #eaeaea; border-radius: 14px; background: #fff; padding: 12px 14px;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 18px; line-height: 1.7; color: #333;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercedes-Benz S550\u003c\/strong\u003e – \u003cstrong\u003e2011–2017\u003c\/strong\u003e (W222 sedan \u0026amp; C217 coupe chassis)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e M278 twin-turbo V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #555; margin-top: 10px; margin-bottom: 18px;\"\u003e\n\u003cstrong\u003eFitment tip:\u003c\/strong\u003e Please confirm your chassis code (W222 or C217) and engine (M278) before ordering. If you’re unsure, message us your VIN (optional) and we’ll help verify compatibility.\u003c\/div\u003e\n\n\u003c!-- Important Notice --\u003e\n\u003cdiv style=\"background: #ffeded; border: 1px solid #f5c2c7; border-radius: 14px; padding: 16px; margin: 18px 0;\"\u003e\n\u003ch3 style=\"margin: 0 0 6px; color: #cc0000; font-size: 18px;\"\u003eImportant Use Notice\u003c\/h3\u003e\n\u003cp style=\"margin: 0; color: #7a1c1c;\"\u003eThis product is intended for off-road or competition use only. Installation may not comply with local emissions regulations and may result in a check engine light without proper tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- Install \/ Notes --\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #eaeaea; border-radius: 14px; padding: 16px; margin: 16px 0;\"\u003e\n\u003ch3 style=\"margin: 0 0 8px; font-size: 16px; font-weight: 900;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul style=\"margin: 0; padding-left: 18px; line-height: 1.7; color: #333;\"\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eInspect\/replace gaskets and hardware as needed during installation.\u003c\/li\u003e\n\u003cli\u003eRe-check for leaks after initial heat cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003c!-- Shipping \/ Returns --\u003e\n\u003cdiv style=\"margin-top: 18px; padding: 14px 16px; border: 1px solid #eaeaea; border-radius: 14px; background: #fafafa;\"\u003e\n\u003cdiv style=\"font-weight: 800; margin-bottom: 6px;\"\u003eShipping \u0026amp; Returns\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444;\"\u003eFast shipping. \u003cstrong\u003e30-day returns\u003c\/strong\u003e accepted for unused and uninstalled items in original packaging. Installed\/modified exhaust components are not eligible for return.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Support --\u003e\n\u003cdiv style=\"margin-top: 18px; padding: 14px 16px; border: 1px solid #eaeaea; border-radius: 14px; background: #fff;\"\u003e\n\u003cdiv style=\"font-weight: 800; margin-bottom: 6px;\"\u003eNeed help confirming fitment?\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; margin-bottom: 10px;\"\u003eMessage us your VIN (optional) or confirm your year\/model and engine (M278) and we’ll help verify before you order.\u003c\/div\u003e\n\u003ca href=\"mailto:benzunitedparts@gmail.com?subject=2011-2017%20S550%20M278%20Downpipes%20Fitment%20Help\" style=\"display: inline-block; background: #111; color: #fff; padding: 12px 24px; border-radius: 8px; text-decoration: none; font-weight: 700; font-size: 15px; border: none; box-shadow: 0 2px 4px rgba(0,0,0,0.1); transition: all 0.2s ease;\"\u003eContact Us\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c!-- FAQ Section - SEO \u0026 ChatGPT Optimized --\u003e\n\u003cdiv style=\"margin-top: 32px; padding: 20px; border: 1px solid #eaeaea; border-radius: 14px; background: #fff;\"\u003e\n\u003ch3 style=\"margin: 0 0 16px 0; font-size: 18px; font-weight: 800;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv style=\"margin-bottom: 18px;\"\u003e\n\u003cstrong\u003eWill these catless downpipes fit my 2011-2017 Mercedes S550 on W222 or C217 chassis?\u003c\/strong\u003e\n\u003cp style=\"margin: 6px 0 0 0; color: #444;\"\u003eYes — these M278 catless downpipes are a direct fit for all 2011–2017 S550 models (W222 sedan \u0026amp; C217 coupe chassis) with the M278 bi-turbo 4.7L V8.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 18px;\"\u003e\n\u003cstrong\u003eDo I need a tune with S550 M278 catless downpipes?\u003c\/strong\u003e\n\u003cp style=\"margin: 6px 0 0 0; color: #444;\"\u003eHighly recommended. A catless setup will usually trigger a check engine light without proper ECU tuning or O2 sensor spacers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 18px;\"\u003e\n\u003cstrong\u003eWhat performance gains can I expect from 2011-2017 S550 downpipes?\u003c\/strong\u003e\n\u003cp style=\"margin: 6px 0 0 0; color: #444;\"\u003eNoticeable improvement in turbo spool, throttle response, and mid-range torque when paired with tuning. Many owners report stronger acceleration and a more responsive feel.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 18px;\"\u003e\n\u003cstrong\u003eAre these high-flow downpipes loud?\u003c\/strong\u003e\n\u003cp style=\"margin: 6px 0 0 0; color: #444;\"\u003eThey produce a deeper, more aggressive exhaust note than stock catalytic converters. Sound level depends on your full exhaust setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 18px;\"\u003e\n\u003cstrong\u003eWill these work on W222 S550 sedan and C217 S550 Coupe?\u003c\/strong\u003e\n\u003cp style=\"margin: 6px 0 0 0; color: #444;\"\u003eYes. The downpipe set is designed for both the W222 sedan and C217 coupe chassis with the M278 engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46717188669615,"sku":null,"price":849.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/w222-s63-amg-m157-catless-downpipes-stainless.jpg?v=1772305144"},{"product_id":"7-piece-carbon-fiber-interior-trim-bundle-c207-a207","title":"7-Piece Carbon Fiber Style Interior Trim Bundle for Mercedes E-Class C207 Coupe \u0026 A207 Cabriolet - Stainless Steel","description":"\u003cdiv style=\"max-width: 800px; margin: 0 auto; font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif; line-height: 1.7; color: #222;\"\u003e\n\u003cp\u003eThis complete 7-piece stainless steel carbon fiber style trim bundle instantly transforms your Mercedes E-Class interior with a sleek, high-end look. Designed specifically for \u003cstrong\u003eC207 Coupe\u003c\/strong\u003e and \u003cstrong\u003eA207 Cabriolet\u003c\/strong\u003e models (2010–2017 E350, E400, E550).\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eWhat's Included (Full 7-Piece Bundle)\u003c\/h2\u003e\n\u003cul style=\"margin: 0 0 24px 20px; padding: 0; list-style: none;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e• \u003cstrong\u003eDoor Panel Trim Set (4 Pieces)\u003c\/strong\u003e — Two long accent strips + two door panel accents that replace the seat adjustment knob surrounds (Left + Right, front \u0026amp; rear)\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e• \u003cstrong\u003eGlove Box Accent Set (2 Pieces)\u003c\/strong\u003e — One long trim strip + one refined accent piece positioned to the left of the radio headunit\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e• \u003cstrong\u003eCenter Console Cup Holder Trim (1 Piece)\u003c\/strong\u003e — One direct replacement panel with dual cup holder cutouts and silver accent rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003ePremium Stainless Steel Construction\u003c\/h2\u003e\n\u003cp\u003eUnlike cheap ABS plastic kits, every piece is made from high-grade stainless steel with a stunning high-gloss carbon fiber finish. Benefits include superior durability, scratch resistance, heat stability in hot parked cars, and a noticeably more solid, luxurious feel.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eEasy Installation\u003c\/h2\u003e\n\u003cp\u003ePre-applied automotive-grade tape on most pieces + direct-fit cup holder trim. Clean surfaces with isopropyl alcohol, test fit first, and warm the interior slightly in cold weather for best adhesion. No drilling required.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eCompatibility\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #f8f8f8;\"\u003e\n\u003cth style=\"padding: 12px 10px; text-align: left; border: 1px solid #ddd;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 12px 10px; text-align: left; border: 1px solid #ddd;\"\u003eBody Style\u003c\/th\u003e\n\u003cth style=\"padding: 12px 10px; text-align: left; border: 1px solid #ddd;\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 10px; border: 1px solid #ddd;\"\u003eE350, E400, E550\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; border: 1px solid #ddd;\"\u003eCoupe (C207)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; border: 1px solid #ddd;\"\u003e2010–2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 10px; border: 1px solid #ddd;\"\u003eE350, E400, E550\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; border: 1px solid #ddd;\"\u003eCabriolet (A207)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; border: 1px solid #ddd;\"\u003e2010–2017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Does \u003cstrong\u003enot\u003c\/strong\u003e fit Sedan (W212) or Wagon (S212).\u003c\/p\u003e\n\u003cdiv style=\"margin-top: 40px; text-align: center; font-size: 15px; color: #555;\"\u003e\n\u003cstrong\u003ebenzunited parts • Quality Mercedes \u0026amp; AMG Components\u003c\/strong\u003e\u003cbr\u003eExact items shown • Buyer responsible for fitment verification\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46995347046575,"sku":null,"price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/mercedes-c207-a207-7-piece-carbon-fiber-interior-trim-bundle-installed.webp?v=1780789123"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/collections\/m278-mercedes-v8-biturbo-engine-bay-e550-cls550-s550.png?v=1763425803","url":"https:\/\/benzunitedparts.com\/collections\/m278-performance-parts-for-mercedes-e550-cls550-s550-sl550-cl550.oembed","provider":"BenzUnited Parts","version":"1.0","type":"link"}