{"product_id":"mad-bmw-s58-3-5-fat-boy-downpipes-m2-m3-m4-g87-g80-g82-g83","title":"MAD BMW S58 Catted Downpipes M2 M3 M4 G87 G80 G82 G83 W\/ No CEL Guarantee \u0026 Flex Section","description":"\u003cp\u003e\u003cstrong\u003eIntroducing the MAD S58 Catted Downpipe\u003c\/strong\u003e\u003cbr\u003eThe perfect upgrade for BMW enthusiasts looking to unlock more performance and a deeper, more aggressive exhaust note without triggering a check engine light.\u003c\/p\u003e\n\u003cp\u003eCrafted from high-quality 304 stainless steel, this downpipe is built to handle extreme heat and harsh driving conditions. The smooth piping transitions are designed for maximum exhaust flow, delivering noticeable gains in horsepower, torque, and throttle response.\u003c\/p\u003e\n\u003cp\u003eEquipped with 300 cell high-flow catalytic converters, the MAD S58 Catted Downpipe improves engine sound and overall drivability while keeping the check engine light off. It bolts directly to the factory exhaust system with no cutting or welding required, making installation quick and hassle-free. It’s also fully compatible with most aftermarket exhaust systems, giving you the freedom to customize your build.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNo CEL guarantee\u003c\/strong\u003e\u003cbr\u003eIf you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free.\u003c\/p\u003e\n\u003cp\u003eDon’t settle for stock performance. Upgrade to the MAD S58 300 Cell Race Catted Downpipes and experience the full potential of your BMW.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty coverage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"ak-ul\"\u003e\n\u003cli\u003e\n\u003cp\u003eThe \"No CEL\" guarantee is valid for 2 years from the date of purchase.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe lifetime warranty still applies in cases of manufacturer defects, such as cracks in the pipe or welds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRace use only\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"ak-ul\"\u003e\n\u003cli\u003e\n\u003cp\u003e300 CEL catalytic converters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo check engine light guarantee\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with right-hand drive and left-hand drive vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSmooth bends for maximum airflow without drone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUp to 30HP increase on stock turbos, even more with upgraded setups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLifetime warranty on defects and fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShips in 1 to 2 business days\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpot-on fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlex section for added durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNOTE: Downpipe gasket is not included. Part # 18308053348 qty 2 is required for installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"ak-ul\"\u003e\n\u003cli\u003e\n\u003cp\u003e2021 and up BMW M3 G80\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2021 and up BMW M4 G82 and G83\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2023 and up BMW M2 G87\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEmissions Disclaimer:\u003c\/strong\u003e\u003cbr\u003eThis product is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003enot legal for sale or use on pollution-controlled vehicles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoperated on public roads, highways, or streets. It is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eintended for off-road, race, or closed-course competition use only\u003c\/strong\u003e, where such modifications are permitted.\u003c\/p\u003e\n\u003cp\u003eBy purchasing this product, you acknowledge and agree that:\u003c\/p\u003e\n\u003cul class=\"ak-ul\"\u003e\n\u003cli\u003e\n\u003cp\u003eYou are\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eresponsible for compliance\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith all applicable emissions laws and regulations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMAD and its affiliates\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edisclaim any liability\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor improper or unlawful use of this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse of this part on public roads may violate the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eFederal Clean Air Act (42 U.S.C. § 7522)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand similar state laws.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease check your local laws before purchase and installation.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":48111247982818,"sku":"MAD-121","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/2594\/0962\/files\/WhatsApp_Image_2025-07-29_at_10.19.19_81cfd151__59452.jpg?v=1785368824","url":"https:\/\/cforceperf.com\/products\/mad-bmw-s58-3-5-fat-boy-downpipes-m2-m3-m4-g87-g80-g82-g83","provider":"CForce Performance","version":"1.0","type":"link"}