{"title":"M157 Catless Downpipes – E63 \u0026 CLS63 (RWD \/ 4MATIC) · S63 AMG","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #222; line-height: 1.6; max-width: 900px; margin: 0 auto;\"\u003e\n\u003ch2 style=\"margin: 0 0 12px; font-size: 22px;\"\u003eM157 Catless Downpipes – E63 \/ CLS63 (RWD \u0026amp; 4MATIC) · S63 AMG\u003c\/h2\u003e\n\u003cp style=\"font-size: 14px; color: #444; margin-bottom: 14px;\"\u003eThis collection features \u003cstrong\u003ecatless downpipes engineered specifically for Mercedes-AMG vehicles equipped with the M157 5.5L BiTurbo V8\u003c\/strong\u003e. Designed to dramatically reduce exhaust restriction after the turbochargers, these downpipes improve turbo response, mid-range torque, and high-RPM power while maintaining proper fitment for each chassis and drivetrain configuration.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #444; margin-bottom: 14px;\"\u003eSeparate configurations are available for \u003cstrong\u003eE63 and CLS63 AMG in both RWD and 4MATIC layouts\u003c\/strong\u003e, as well as \u003cstrong\u003eS63 AMG models\u003c\/strong\u003e. Each product in this collection is built for its specific platform to ensure correct routing, clearance, and installation.\u003c\/p\u003e\n\u003cdiv style=\"border-top: 1px solid #eee; padding-top: 12px; margin-top: 18px;\"\u003e\n\u003ch3 style=\"margin: 0 0 10px; font-size: 18px;\"\u003eWhat These Downpipes Deliver\u003c\/h3\u003e\n\u003cul style=\"margin: 0 0 12px 18px; padding: 0; font-size: 14px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced exhaust backpressure\u003c\/strong\u003e for faster turbo spool and stronger torque\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved throttle response\u003c\/strong\u003e and power delivery across the RPM range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher power ceiling\u003c\/strong\u003e when paired with ECU tuning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeeper, more aggressive exhaust tone\u003c\/strong\u003e under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect bolt-on fitment\u003c\/strong\u003e for the intended chassis and drivetrain\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #eee; padding-top: 12px; margin-top: 18px;\"\u003e\n\u003ch3 style=\"margin: 0 0 10px; font-size: 18px;\"\u003eFitment Notes\u003c\/h3\u003e\n\u003cul style=\"margin: 0 0 12px 18px; padding: 0; font-size: 14px;\"\u003e\n\u003cli\u003eE63 AMG \u0026amp; CLS63 AMG are available in \u003cstrong\u003eRWD and 4MATIC-specific versions\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eS63 AMG uses a \u003cstrong\u003esingle drivetrain configuration\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEach listing specifies the correct chassis and drivetrain compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 14px; color: #444; margin-top: 14px;\"\u003eFor best results, these downpipes are intended to be paired with a \u003cstrong\u003ecustom ECU calibration\u003c\/strong\u003e. Proper tuning allows the engine to fully take advantage of the reduced restriction and prevents unwanted warning lights.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"mercedes-e63s-cls63s-4matic-downpipes","title":"2014–2017 Mercedes E63 S AMG 4MATIC W212 \/ CLS63 S C218 M157 Catless Downpipes","description":"\u003cstyle\u003e\n  .bu-wrap {\n    font-family: Arial, sans-serif;\n    color: #333;\n    line-height: 1.6;\n    max-width: 900px;\n    margin: 0 auto;\n    padding: 20px;\n  }\n  .section {\n    background: #f9f9f9;\n    border: 1px solid #e5e5e5;\n    border-radius: 8px;\n    padding: 16px;\n    margin-bottom: 18px;\n  }\n  .highlight {\n    background: #fff;\n    border: 1px solid #e9e9e9;\n    border-radius: 10px;\n    padding: 18px;\n    margin-bottom: 18px;\n  }\n  h2 {\n    margin: 0 0 10px;\n    color: #0056b3;\n    font-size: 1.5em;\n  }\n  h3 {\n    margin: 10px 0;\n    color: #0056b3;\n    font-size: 1.2em;\n  }\n  ul, p {\n    margin: 0;\n  }\n  ul { padding-left: 20px; }\n  .cta-button {\n    background-color: #cc0000;\n    color: #fff;\n    padding: 10px 20px;\n    border-radius: 6px;\n    text-decoration: none;\n    font-weight: bold;\n    display: inline-block;\n    margin-top: 15px;\n  }\n  .cta-button:hover { background-color: #a00000; }\n  table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-top: 10px;\n  }\n  th, td {\n    border: 1px solid #ddd;\n    padding: 8px;\n    text-align: left;\n  }\n  th { background: #f2f2f2; }\n  .note {\n    font-style: italic;\n    color: #555;\n  }\n  @media (max-width: 768px) {\n    h2 { font-size: 1.3em; }\n    h3 { font-size: 1.1em; }\n    ul, p { font-size: 0.95em; }\n    .cta-button { padding: 8px 16px; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"bu-wrap\"\u003e\n\u003c!-- COMPLIANCE (REQUIRED FOR GOOGLE SHOPPING) --\u003e\n\u003cdiv style=\"background: #fff3cd; border-color: #ffe8a1;\" class=\"section\"\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #444;\"\u003e\u003cstrong\u003eOff-road and race use only.\u003c\/strong\u003e Not legal for street use or emissions-controlled vehicles. Intended for closed-course competition or off-road applications where permitted.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- HERO SUMMARY (LUXURY + CLARITY) --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cp style=\"margin: 0; text-align: center;\"\u003e\u003cstrong\u003eHigh-flow performance downpipes\u003c\/strong\u003e for \u003cstrong\u003eMercedes E63S (W212) \u0026amp; CLS63S (W218) 4MATIC\u003c\/strong\u003e, \u003cstrong\u003e2014–2017\u003c\/strong\u003e — engineered for improved exhaust flow, sharper turbo response, and a deeper AMG exhaust character with OEM-like fitment and drivability.\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-top: 8px;\" class=\"note\"\u003eBuilt for owners who want refined performance — not noisy compromises.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- BENEFITS \/ VALUE --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eHear It \u0026amp; See the Upside\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance potential:\u003c\/strong\u003e strong gains with ECU calibration (results vary by setup)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper response:\u003c\/strong\u003e reduced restriction supports quicker turbo spool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefined AMG tone:\u003c\/strong\u003e deeper under load without excessive harshness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt correctly:\u003c\/strong\u003e TIG-welded 304 stainless steel, direct bolt-on design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center; margin-top: 15px;\"\u003e\n\u003ca href=\"https:\/\/benzunitedparts.com\/products\/custom-ecu-tuning-for-e63-cls63\" class=\"cta-button\"\u003e ECU Calibration for M157 V8 BiTurbo \u003c\/a\u003e\n\u003cdiv style=\"margin-top: 8px; text-align: center;\" class=\"note\"\u003eECU calibration is recommended to optimize performance and manage emissions-related fault codes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SPECS + ENGINEERING --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-grade 304 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 3-inch piping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWelds:\u003c\/strong\u003e Back-purged TIG welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Brushed\/polished (batch dependent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight savings:\u003c\/strong\u003e approximately 10–15 lbs vs OEM (varies by vehicle\/spec)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall time:\u003c\/strong\u003e typically 2–3 hours (professional installation recommended)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"margin-top: 14px;\" class=\"section\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eWhy Fitment Matters on M157\u003c\/h3\u003e\n\u003cp style=\"margin: 0;\"\u003eThe M157 bi-turbo packaging leaves limited space around heat shielding and fasteners. These downpipes are designed with platform-specific routing and sealing surfaces to support clean installation and serviceability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014–2017\u003c\/td\u003e\n\u003ctd\u003eMercedes E63S AMG (W212) 4MATIC\u003c\/td\u003e\n\u003ctd\u003eM157 V8 BiTurbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014–2017\u003c\/td\u003e\n\u003ctd\u003eMercedes CLS63S AMG (W218) 4MATIC\u003c\/td\u003e\n\u003ctd\u003eM157 V8 BiTurbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"text-align: center; margin-top: 15px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/products\/performance-intake-spacer-kit-fits-mercedes-benz-m278-m157-engines\" style=\"background-color: #004aad;\" class=\"cta-button\"\u003e Add Intake Spacer Kit \u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ (SHOPPING-SAFE) --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp style=\"margin: 0 0 10px;\"\u003e\u003cstrong\u003eWill these downpipes work on the stock tune?\u003c\/strong\u003e\u003cbr\u003eThe vehicle may run without calibration, but ECU tuning is recommended for best drivability, performance optimization, and to manage emissions-related fault codes.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px;\"\u003e\u003cstrong\u003eWill installing these trigger a check engine light?\u003c\/strong\u003e\u003cbr\u003eCheck engine lights may occur when running catless downpipes without ECU calibration.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eAre these street legal?\u003c\/strong\u003e\u003cbr\u003eNo — these are intended for off-road or closed-course competition use only where permitted.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin-top: 15px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/collections\/m157-performance-parts-for-mercedes-e63-amg-e63s-cls63-cls63s\" style=\"background-color: #1a1a1a;\" class=\"cta-button\"\u003e Browse All M157 Performance Parts \u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- WHY BUY (LUXURY TRUST) --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWhy Buy from BenzUnited\u003c\/h2\u003e\n\u003cp style=\"margin: 0 0 10px;\"\u003eWe focus on \u003cstrong\u003eMercedes-Benz performance platforms\u003c\/strong\u003e, supporting both AMG and non-AMG applications with platform-aware parts and enthusiast-level guidance.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px;\"\u003eEach set is \u003cstrong\u003eQC’d for fitment\u003c\/strong\u003e and designed for OEM-style installation points to reduce install friction and support long-term serviceability.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px;\"\u003e\u003cstrong\u003eFast U.S. shipping with tracking\u003c\/strong\u003e and support that understands the M157 platform.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\" class=\"note\"\u003eBuilt for owners prioritizing fitment precision, sound quality, and platform-specific engineering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- FINAL CTA --\u003e\n\u003cdiv style=\"text-align: center; margin-top: 20px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/products\/m157-downpipes-4matic\" class=\"cta-button\"\u003e Shop Now \u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":44788968489135,"sku":null,"price":800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/m157-downpipes-mercedes-cls63s-w218-4matic-stainless-closeup.jpg?v=1760324963"},{"product_id":"mercedes-e63-cls63-m157-downpipes","title":"2014–2016 Mercedes E63 AMG W212 \/ CLS63 C218 M157 RWD Catless Downpipes","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .bu-wrap {\n    font-family: Arial, sans-serif;\n    color: #333;\n    line-height: 1.6;\n    max-width: 900px;\n    margin: 0 auto;\n    padding: 20px;\n  }\n  .section {\n    background: #f9f9f9;\n    border: 1px solid #e5e5e5;\n    border-radius: 8px;\n    padding: 16px;\n    margin-bottom: 18px;\n  }\n  .highlight {\n    background: #fff;\n    border: 1px solid #e9e9e9;\n    border-radius: 10px;\n    padding: 18px;\n    margin-bottom: 18px;\n  }\n  h2 {\n    margin: 0 0 10px;\n    color: #0056b3;\n    font-size: 1.5em;\n  }\n  h3 {\n    margin: 10px 0;\n    color: #0056b3;\n    font-size: 1.2em;\n  }\n  ul, p {\n    margin: 0;\n  }\n  ul { padding-left: 20px; }\n  .cta-button {\n    background-color: #cc0000;\n    color: #fff;\n    padding: 10px 20px;\n    border-radius: 6px;\n    text-decoration: none;\n    font-weight: bold;\n    display: inline-block;\n    margin-top: 15px;\n  }\n  .cta-button:hover { background-color: #a00000; }\n  table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-top: 10px;\n  }\n  th, td {\n    border: 1px solid #ddd;\n    padding: 8px;\n    text-align: left;\n  }\n  th { background: #f2f2f2; }\n  .note {\n    font-style: italic;\n    color: #555;\n  }\n  @media (max-width: 768px) {\n    h2 { font-size: 1.3em; }\n    h3 { font-size: 1.1em; }\n    ul, p { font-size: 0.95em; }\n    .cta-button { padding: 8px 16px; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"bu-wrap\"\u003e\n\u003c!-- 1. HERO SUMMARY --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cp style=\"margin: 0; text-align: center;\"\u003e\u003cstrong\u003eHigh-flow performance downpipes\u003c\/strong\u003e for the \u003cstrong\u003eMercedes E63 AMG (W212) and CLS63 AMG (C218)\u003c\/strong\u003e, \u003cstrong\u003e2012–2016\u003c\/strong\u003e. Designed to improve exhaust flow, reduce backpressure, and unlock deeper AMG exhaust character with OEM-style fitment and drivability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. COMPATIBILITY --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012–2016\u003c\/td\u003e\n\u003ctd\u003eMercedes E63 AMG \/ E63 S AMG (W212)\u003c\/td\u003e\n\u003ctd\u003eM157 5.5L V8 BiTurbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012–2016\u003c\/td\u003e\n\u003ctd\u003eMercedes CLS63 AMG \/ CLS63 S AMG (C218)\u003c\/td\u003e\n\u003ctd\u003eM157 5.5L V8 BiTurbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 13px; color: #888; margin-top: 8px;\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 3. WHAT YOU GAIN --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eWhat You Gain\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong performance potential:\u003c\/strong\u003e significant gains with ECU calibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSharper response:\u003c\/strong\u003e reduced exhaust restriction supports quicker turbo spool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefined AMG tone:\u003c\/strong\u003e deeper under load without excessive harshness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt correctly:\u003c\/strong\u003e TIG-welded 304 stainless steel, direct bolt-on design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003eECU calibration is recommended to optimize performance and manage emissions-related fault codes.\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin-top: 15px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/products\/custom-ecu-tuning-for-e63-cls63\" class=\"cta-button\"\u003eECU Calibration for M157 V8 BiTurbo\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 4. TECHNICAL SPECS --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-grade 304 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 3-inch piping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWelds:\u003c\/strong\u003e Back-purged TIG welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Brushed or polished — message us before ordering to confirm current batch finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight savings:\u003c\/strong\u003e approximately 10–15 lbs vs OEM (varies by configuration)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall time:\u003c\/strong\u003e typically 2–3 hours (professional installation recommended)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center; margin-top: 15px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/products\/performance-intake-spacer-kit-fits-mercedes-benz-m278-m157-engines\" class=\"cta-button\"\u003eAdd Intake Spacer Kit\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 5. FAQ --\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003e\u003cstrong\u003eWill these downpipes work on the stock tune?\u003c\/strong\u003e\u003cbr\u003eThe vehicle may operate without calibration, but ECU tuning is recommended for best drivability and performance optimization.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003e\u003cstrong\u003eWill installing these trigger a check engine light?\u003c\/strong\u003e\u003cbr\u003eCheck engine lights may occur when running catless downpipes without ECU calibration.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003e\u003cstrong\u003eAre these street legal?\u003c\/strong\u003e\u003cbr\u003eNo — these components are intended for off-road or closed-course competition use only.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center; margin-top: 15px;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/collections\/m157-performance-parts-for-mercedes-e63-amg-e63s-cls63-cls63s\" class=\"cta-button\" style=\"background-color: #1a1a1a;\"\u003eBrowse All M157 Performance Parts\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 6. WHY BUY --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWhy Buy from BenzUnited\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003eWe focus on \u003cstrong\u003eMercedes-Benz performance platforms\u003c\/strong\u003e, supporting AMG and non-AMG applications with platform-aware fitment and enthusiast-level knowledge.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003eEach set is \u003cstrong\u003equality-checked for fitment\u003c\/strong\u003e and designed for OEM-style installation points.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 10px;\"\u003e\u003cstrong\u003eFast U.S. shipping with tracking\u003c\/strong\u003e and support from people who know the M157 platform inside and out.\u003c\/p\u003e\n\u003cp class=\"note\"\u003eBuilt for owners prioritizing fitment precision, sound quality, and long-term reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 7. COMPLIANCE --\u003e\n\u003cdiv class=\"section\" style=\"background: #fff3cd; border-color: #ffe8a1;\"\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #444;\"\u003e\u003cstrong\u003eOff-road and race use only.\u003c\/strong\u003e Not legal for street use or emissions-controlled vehicles. Intended for closed-course competition or off-road applications where permitted by law.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":44788931821743,"sku":null,"price":849.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/m157-downpipes-mercedes-cls63-w218-closeup.jpg?v=1774837128"},{"product_id":"catless-downpipes-for-mercedes-benz-s63-amg-w222-m157","title":"W222 S63 AMG M157 Catless Downpipes – Premium Stainless Steel High-Flow Set","description":"\u003cdiv style=\"max-width: 860px; margin: 0 auto; font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif; line-height: 1.7; color: #222;\"\u003e\n\u003cp style=\"font-size: 16.5px; margin-bottom: 28px;\"\u003eFor the serious W222 S63 owner who wants to unlock the full potential of the M157 BiTurbo V8. These premium stainless steel catless downpipes dramatically reduce exhaust restriction, deliver a deeper, more aggressive AMG exhaust note, and provide noticeable improvements in turbo spool and mid-range response.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul style=\"margin: 0 0 24px 20px; padding: 0; list-style: none;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Complete left + right catless downpipe set\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Premium V-band clamps and mounting hardware\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Gaskets included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eKey Benefits\u003c\/h2\u003e\n\u003cul style=\"margin: 0 0 24px 20px; padding: 0; list-style: none;\"\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Significant reduction in exhaust backpressure for faster turbo spool and stronger mid-range power\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Deeper, more aggressive AMG V8 sound with rich crackles and pops when tuned\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Premium 304 stainless steel construction with back-purged TIG welds for long-term reliability\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• True bolt-on fitment — no cutting or modifications required\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 8px;\"\u003e• Designed for serious S63 builds — the flagship Mercedes-AMG sedan deserves flagship performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eVehicle Compatibility\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 12px; font-size: 15.5px;\"\u003eMercedes-AMG S63 (W222) 2014–2017 with M157 BiTurbo 5.5L V8\u003c\/p\u003e\n\u003cp style=\"font-size: 14.5px; color: #666;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Professional installation recommended. Tuning highly advised to maximize gains and prevent check engine lights.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eWhy S63 Owners Choose These Downpipes\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 24px; font-size: 15.5px;\"\u003eThe W222 S63 is already a flagship grand tourer. These catless downpipes transform it into a true performance machine — delivering the sound, response, and power the M157 V8 was always capable of. Perfect for owners who want to take their S-Class to the next level without compromising daily drivability.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eInstallation \u0026amp; Notes\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 24px; font-size: 15.5px;\"\u003eDirect bolt-on replacement. Average install time: 2–3 hours. Professional installation strongly recommended. Re-check for leaks after the first heat cycle.\u003c\/p\u003e\n\u003ch2 style=\"font-size: 20px; margin: 32px 0 12px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eQ: Will these throw a check engine light?\u003c\/strong\u003e\u003cbr\u003eA: Yes, in most cases without proper ECU tuning. We recommend pairing these downpipes with custom tuning for best results and to clear codes.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eQ: How much power can I expect?\u003c\/strong\u003e\u003cbr\u003eA: Noticeable gains in mid-range torque and throttle response. Exact numbers depend on your tune and supporting modifications.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eQ: Are these street legal?\u003c\/strong\u003e\u003cbr\u003eA: No. These are off-road \/ competition use only.\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 item shown • Proudly tested on multiple W222 S63 vehicles • Buyer responsible for final fitment verification\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46598480134319,"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/collections\/w222-s63-amg-m157-catless-downpipes-stainless.jpg?v=1772328452","url":"https:\/\/benzunitedparts.com\/collections\/m157-catless-downpipes.oembed","provider":"BenzUnited Parts","version":"1.0","type":"link"}