{"product_id":"m177-catless-downpipes-amg-gt63-x290-e63-w213","title":"M177 Catless Downpipes for Mercedes-AMG GT 63 (X290) \u0026 E63 \/ E63S (W213) – 304 Stainless Steel","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, track, and racing use only.\u003c\/strong\u003e Not legal for highway use in emissions-restricted areas.\u003c\/p\u003e\n\n\u003cp style=\"font-size: 17px; color: #333; margin-bottom: 24px;\"\u003eThese 304 stainless steel catless downpipes replace the restrictive factory catalytic converters on the M177 4.0L BiTurbo V8. They significantly improve exhaust flow, enable faster turbo spool, and deliver sharper throttle response while maintaining excellent build quality.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 21px; margin: 0 0 14px; color: #222;\"\u003eChoose Your Setup\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 14px;\"\u003eTwo options above let you build exactly the package you want:\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 20px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1a1a1a; color: #fff;\"\u003e\n\u003cth style=\"padding: 12px 14px; text-align: left; border: 1px solid #333;\"\u003eConfiguration\u003c\/th\u003e\n\u003cth style=\"padding: 12px 14px; text-align: left; border: 1px solid #333;\"\u003ePrice\u003c\/th\u003e\n\u003cth style=\"padding: 12px 14px; text-align: left; border: 1px solid #333;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003eDownpipes only\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e$649\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003eYou already have tuning lined up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e+ Heat shielding\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e$749\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003eDaily-driven or hot-climate cars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e+ Custom ECU tune\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e$2,895\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003eComplete Stage 2, one order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e+ Both\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e$2,995\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #ddd;\"\u003eThe full package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-bottom: 32px;\"\u003e\u003cstrong\u003eWhy bundle the tune?\u003c\/strong\u003e Run catless without one and you'll likely set a check-engine light and leave most of the potential power unclaimed. Selecting it here means the calibration is built around these exact downpipes from day one — and it costs less than buying the downpipes and a standalone tune separately.\u003c\/p\u003e\n\n\u003cp style=\"background: #f8f8f8; padding: 14px 18px; border-radius: 10px; font-size: 15px; margin-bottom: 32px;\"\u003e\u003cstrong\u003ePrefer shielding as standard?\u003c\/strong\u003e The \u003ca href=\"https:\/\/benzunitedparts.com\/products\/e63-gt63-heat-shielded-catless-downpipes\" style=\"color: #b30000; font-weight: 600;\"\u003eheat-shielded listing →\u003c\/a\u003e covers the same fitment with thermal shields fitted as standard.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 21px; margin-bottom: 18px; color: #1a1a1a;\"\u003eReal M177 Exhaust Sound\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 12px; font-weight: 600;\"\u003eWith tune + these downpipes\u003c\/p\u003e\n\u003ciframe title=\"M177 Catless Downpipes Sound - Tuned\" src=\"https:\/\/www.youtube.com\/embed\/Y9tOWsqLiL0\" style=\"max-width: 720px; border-radius: 10px; display: block; margin: 0 auto 24px;\" height=\"340\" width=\"100%\" loading=\"lazy\"\u003e\u003c\/iframe\u003e\n\u003cp style=\"margin-bottom: 12px; font-weight: 600;\"\u003eDownpipes only (stock tune)\u003c\/p\u003e\n\u003cvideo aria-label=\"Mercedes-AMG W213 E63 S revving with newly installed M177 catless downpipes – real exhaust sound on stock tune\" style=\"max-width: 720px; border-radius: 10px; display: block; margin: 0 auto 32px;\" controls=\"controls\" height=\"340\" width=\"100%\"\u003e\u003csource type=\"video\/mp4\" src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/12a3c498ceb44af88a9367ac1c462995.mp4\"\u003eYour browser does not support the video tag.\u003c\/source\u003e\u003c\/video\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\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\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;\"\u003eX290\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2019–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eAMG GT 63 4-Door Coupe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eX290\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2019–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eAMG GT 63 S 4-Door Coupe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eW213\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2017–2023\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eE63 AMG S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eW213\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003e2016–2020\u003c\/td\u003e\n\u003ctd style=\"padding: 14px 16px; border: 1px solid #ddd;\"\u003eE63 AMG\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;\"\u003eThe engine code decides fitment, not the badge. If your car is on that list, these bolt straight on with no cutting.\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'll run on a stock car, but a tune is strongly recommended — both to get the full benefit and to clear the fault codes that catless pipes typically set. You can add it directly above. There's a sound clip of both configurations so you can hear the difference.\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 the stock tune. Removing the cats means the downstream O₂ sensors read differently than the ECU expects. A tune 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;\"\u003eIs the heat shielding worth it?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eOn a daily-driven car, in a hot climate, or on a tuned setup — yes. It keeps heat in the exhaust stream for quicker spool and drops radiant heat soak into surrounding wiring and sensors. On a dedicated track car with other cooling upgrades, the standard version is usually enough.\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 these street legal?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eNo — fully catless, intended for off-road, track, and racing use only. Not emissions-compliant for street use in most areas.\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 do I know they fit my car?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eThese fit the M177 BiTurbo V8 in the \u003cstrong\u003eAMG GT 63 and GT 63 S (X290, 2019–2023)\u003c\/strong\u003e, \u003cstrong\u003eE63 AMG (W213, 2016–2020)\u003c\/strong\u003e, and \u003cstrong\u003eE63 AMG S (W213, 2017–2023)\u003c\/strong\u003e. The engine code decides fitment, not the badge. \u003cstrong\u003eUnsure?\u003c\/strong\u003e \u003ca href=\"mailto:benzunitedparts@gmail.com?subject=M177%20Downpipe%20Fitment%20Check\" style=\"color: #b30000; font-weight: 600;\"\u003eSend your year, model, and VIN\u003c\/a\u003e and we'll 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;\"\u003e2–3 hours at a professional shop. It's a bolt-on V-band design — no cutting or modification required.\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;\"\u003eWhat's included?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 24px; color: #444;\"\u003eA pair of 304 stainless steel catless downpipes with machined flanges and V-band clamps. Message us if you need to confirm gaskets or hardware for your specific chassis.\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 all orders\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 M177 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=M177%20Catless%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;\"\u003ePremium-Quality M177 Downpipes • 12-Month Warranty • Ships Fast • 30-Day Returns\u003c\/p\u003e\n\u003cp style=\"text-align: center; font-size: 13px; color: #666; margin-top: 20px;\"\u003e\u003cem\u003eFor off-road, track, and racing use only. Not legal for highway use in emissions-restricted areas.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"No \/ No","offer_id":47166601003183,"sku":null,"price":649.0,"currency_code":"USD","in_stock":true},{"title":"Yes \/ No","offer_id":47166601035951,"sku":null,"price":749.0,"currency_code":"USD","in_stock":true},{"title":"No \/ Yes","offer_id":47220985725103,"sku":null,"price":2895.0,"currency_code":"USD","in_stock":true},{"title":"Yes \/ Yes","offer_id":47220985757871,"sku":null,"price":2995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/w213-e63s-amg-catless-downpipes.png?v=1770253954","url":"https:\/\/benzunitedparts.com\/products\/m177-catless-downpipes-amg-gt63-x290-e63-w213","provider":"BenzUnited Parts","version":"1.0","type":"link"}