{"product_id":"m178-catless-downpipes-mercedes-amg-gt-gts-gtr-gtc","title":"M178 Catless Downpipes – Mercedes-AMG GT \/ GT S \/ GT C \/ GT R (R190) 4.0L V8 BiTurbo","description":"\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif; color: #222; line-height: 1.75; max-width: 920px; margin: 0 auto; padding: 24px 20px;\"\u003e\n\u003cp style=\"font-size: 13px; color: #555; text-align: center; margin-bottom: 20px;\"\u003e\u003cstrong\u003eOff-road and race use only.\u003c\/strong\u003e Not legal for street use or emissions-controlled vehicles. Buyer is responsible for compliance with local laws.\u003c\/p\u003e\n\n\u003cp style=\"font-size: 17px; color: #333; margin-bottom: 32px;\"\u003eFor the discerning AMG GT owner who values sophistication and real performance. These high-flow stainless steel catless downpipes are purpose-built for the M178 BiTurbo V8 to deliver improved exhaust flow, quicker turbo response, and a deeper, more composed AMG exhaust note — while preserving the refined character expected of a flagship Mercedes performance car.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 21px; margin-bottom: 18px; color: #1a1a1a;\"\u003eReal M178 Exhaust Sound\u003c\/h2\u003e\n\u003ciframe title=\"AMG GT M178 Downpipes Sound\" src=\"https:\/\/www.youtube.com\/embed\/1RYF-yC9eH4\" style=\"max-width: 720px; border-radius: 10px; display: block; margin: 0 auto 32px;\" height=\"340\" width=\"100%\" loading=\"lazy\"\u003e\u003c\/iframe\u003e\n\n\u003ch2 style=\"font-size: 21px; margin: 0 0 14px; color: #222;\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul style=\"padding-left: 22px; margin-bottom: 32px; line-height: 1.85; font-size: 16px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Exhaust Backpressure\u003c\/strong\u003e — Allows the turbos to spool more efficiently and build boost faster under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuicker Turbo Response\u003c\/strong\u003e — Sharper throttle feel with more immediate power delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefined AMG Sound\u003c\/strong\u003e — Deeper, more composed tone that maintains sophistication at cruise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision TIG Welds \u0026amp; Machined Flanges\u003c\/strong\u003e — Creates strong, leak-free connections with exact factory fitment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt-on V-Band Design\u003c\/strong\u003e — Simple installation in 2–3 hours with no cutting or modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Wall 304 Stainless Steel\u003c\/strong\u003e — High-quality material selected for heat resistance and long-term durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"background: #1a1a1a; color: #eaeaea; border-left: 4px solid #b30000; border-radius: 10px; padding: 22px 24px; margin-bottom: 36px;\"\u003e\n\u003ch2 style=\"font-size: 20px; margin: 0 0 12px; color: #fff;\"\u003ePair With Tuning\u003c\/h2\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eDownpipes are the hardware half of the equation. \u003cstrong\u003eTuning is what turns them loose\u003c\/strong\u003e — it lets the ECU take advantage of the extra flow, and it addresses the fault codes the catless design will otherwise set on a stock car.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003ca href=\"https:\/\/benzunitedparts.com\/products\/jb4-performance-tuner-for-mercedes-benz-amg-c63-e63-gt-glc-63-m178-up-to-100-whp\" style=\"color: #ff6b6b; font-weight: 700;\"\u003eAdd the M178 JB4 performance tuner →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size: 21px; margin: 0 0 14px; color: #222;\"\u003eCompatibility\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 24px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1a1a1a; color: #fff;\"\u003e\n\u003cth style=\"padding: 14px 16px; text-align: left; border: 1px solid #333;\"\u003eChassis\u003c\/th\u003e\n\u003cth style=\"padding: 14px 16px; text-align: left; border: 1px solid #333;\"\u003eYears\u003c\/th\u003e\n\u003cth style=\"padding: 14px 16px; text-align: left; border: 1px solid #333;\"\u003eModels\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eR190\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2015–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eAMG GT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eR190\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2015–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eAMG GT S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eR190\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2016–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eAMG GT R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eR190\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2018–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eAMG GT C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 15px; color: #444; margin-bottom: 36px;\"\u003eIf your car is on that list, these bolt straight on with no cutting or fabrication.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 21px; margin-bottom: 18px; color: #222;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 16px; border-bottom: 1px solid #eee; padding-bottom: 16px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer; font-size: 16px;\"\u003eDo these require a tune?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eThey work well on stock vehicles. Tuning is highly recommended for maximum performance and to address fault codes.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 16px; border-bottom: 1px solid #eee; padding-bottom: 16px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer; font-size: 16px;\"\u003eWill I get a check engine light?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eLikely, on a stock car. Removing the cats means the downstream O₂ sensors read differently than the ECU expects. Tuning resolves it properly — we do not recommend defeat devices.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 16px; border-bottom: 1px solid #eee; padding-bottom: 16px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer; font-size: 16px;\"\u003eAre they catless?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eYes — fully catless. Intended for off-road, track, and racing use only.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 16px; border-bottom: 1px solid #eee; padding-bottom: 16px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer; font-size: 16px;\"\u003eWill they fit my exact vehicle?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eThese fit the \u003cstrong\u003eR190\u003c\/strong\u003e AMG GT and GT S (2015–2023), GT R (2016–2023), and GT C (2018–2023) — all with the M178 4.0L BiTurbo V8. If your car is on that list, it bolts straight on with no cutting. \u003cstrong\u003eNot sure?\u003c\/strong\u003e \u003ca href=\"mailto:benzunitedparts@gmail.com?subject=M178%20Downpipe%20Fitment%20Check\" style=\"color: #b30000; font-weight: 600;\"\u003eSend us your VIN\u003c\/a\u003e and we will confirm before you order.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 16px; border-bottom: 1px solid #eee; padding-bottom: 16px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer; font-size: 16px;\"\u003eHow long does installation take?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eProfessional shops typically complete the install in 2–3 hours.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 32px; border-bottom: 1px solid #eee; padding-bottom: 16px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer; font-size: 16px;\"\u003eIs there a warranty?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eYes — a 12-month structural warranty, with guaranteed fitment on every model listed above.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2 style=\"font-size: 21px; margin: 0 0 14px; color: #222;\"\u003eBuy With Confidence\u003c\/h2\u003e\n\u003cul style=\"padding-left: 22px; margin-bottom: 32px; line-height: 1.85; font-size: 16px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-month structural warranty\u003c\/strong\u003e with guaranteed fitment on listed models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree U.S. shipping\u003c\/strong\u003e with tracking on every order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment confirmed before you buy\u003c\/strong\u003e — send your VIN and we'll verify before you order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercedes-AMG specialists\u003c\/strong\u003e — we focus exclusively on Mercedes platforms and know the M178 inside out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal support\u003c\/strong\u003e — questions before or after purchase go straight to us, not a call center\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-bottom: 36px;\"\u003e\u003ca href=\"mailto:benzunitedparts@gmail.com?subject=M178%20AMG%20GT%20Downpipes%20Fitment%20Help\" style=\"color: #b30000; font-weight: 600;\"\u003eConfirm fitment or ask a question →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp style=\"text-align: center; font-size: 14px; color: #555; font-weight: 600; letter-spacing: 0.3px;\"\u003eBenzUnited Parts • Premium M178 Downpipes • 12-Month Warranty • Ships Fast\u003c\/p\u003e\n\u003cp style=\"text-align: center; font-size: 13px; color: #666; margin-top: 20px;\"\u003e\u003cem\u003eFor off-road and racing use only. Not legal for street use or emissions-controlled vehicles.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":44504204148911,"sku":null,"price":795.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/mercedes-amg-gt-m178-downpipes-stainless-steel-set.jpg?v=1770023028","url":"https:\/\/benzunitedparts.com\/products\/m178-catless-downpipes-mercedes-amg-gt-gts-gtr-gtc","provider":"BenzUnited Parts","version":"1.0","type":"link"}