{"product_id":"mad-bmw-s58-catted-downpipes-m3-m4-g80-g82-g83-w-no-cel-guarantee-flex-section","title":"MAD BMW S58 Catted Downpipes M3 M4 G80 G82 G83 W\/ No CEL Guarantee \u0026 Flex Section","description":"Introducing the MAD S58 Catted DownpipeThe perfect upgrade for BMW enthusiasts looking to unlock more performance and a deeper, more aggressive exhaust note without triggering a check engine light.\r\nCrafted 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.\r\nEquipped 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.\r\nNo CEL guaranteeIf you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free.\r\nDon’t settle for stock performance. Upgrade to the MAD S58 300 Cell Race Catted Downpipes and experience the full potential of your BMW.\r\nWarranty coverage\r\n\r\n\r\nThe \"No CEL\" guarantee is valid for 2 years from the date of purchase.\r\n\r\n\r\nThe lifetime warranty still applies in cases of manufacturer defects, such as cracks in the pipe or welds.\r\n\r\n\r\nRace use only\r\nFeatures\r\n\r\n\r\n300 CEL catalytic converters\r\n\r\n\r\nNo check engine light guarantee\r\n\r\n\r\nCompatible with right-hand drive and left-hand drive vehicles\r\n\r\n\r\nSmooth bends for maximum airflow without drone\r\n\r\n\r\nUp to 30HP increase on stock turbos, even more with upgraded setups\r\n\r\n\r\nLifetime warranty on defects and fitment\r\n\r\n\r\n90-day return period\r\n\r\n\r\nShips in 1 to 2 business days\r\n\r\n\r\nSpot-on fitment\r\n\r\n\r\nFlex section for added durability\r\n\r\n\r\nFitment\r\n\r\n\r\n2021 and up BMW M3 G80\r\n\r\n\r\n2021 and up BMW M4 G82 and G83\r\n\r\n\r\n2023 and up BMW M2 G87\r\n\r\n\r\nEmissions Disclaimer:This product is not legal for sale or use on pollution-controlled vehicles operated on public roads, highways, or streets. It is intended for off-road, race, or closed-course competition use only, where such modifications are permitted.\r\nBy purchasing this product, you acknowledge and agree that:\r\n\r\n\r\nYou are responsible for compliance with all applicable emissions laws and regulations.\r\n\r\n\r\nMAD and its affiliates disclaim any liability for improper or unlawful use of this product.\r\n\r\n\r\nUse of this part on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws.\r\n\r\n\r\nPlease check your local laws before purchase and installation.","brand":"MAD","offers":[{"title":"Default Title","offer_id":45444958126278,"sku":"MAD-121","price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/0804\/8420\/files\/WhatsApp_Image_2025-07-29_at_10.19.19_73372dc1__72815.1753981046.386.513.jpg?v=1768321385","url":"https:\/\/www.graveyardperformance.com\/products\/mad-bmw-s58-catted-downpipes-m3-m4-g80-g82-g83-w-no-cel-guarantee-flex-section","provider":"Graveyard Performance","version":"1.0","type":"link"}