{"product_id":"mad-bmw-f9x-m5-m8-catted-downpipes-w-no-cel-guarantee","title":"MAD BMW F9x M5 M8 Catted Downpipes W\/ No CEL Guarantee","description":"Unlock the true sound and performance of your BMW F9X M5 or M8 with the MAD Catted Downpipes, now with a No CEL Guarantee.\r\nUpgrade your restrictive stock downpipes to the MAD high-flow catted design and experience significant improvements in exhaust flow, turbo spool, and throttle response. Built from premium 304 stainless steel, these downpipes are engineered to handle extreme heat and deliver long-lasting durability.\r\nWith 300 cell high-flow catalytic converters, you get the perfect balance of performance and drivability. Expect a deeper, more aggressive exhaust note with quicker turbo response, all while avoiding check engine lights. If a CEL does occur due to the catalytic converter, MAD will replace the downpipes for free.\r\nThese downpipes are designed as a direct bolt-on upgrade with spot-on fitment, no cutting or welding required. They work seamlessly with the stock exhaust system as well as aftermarket setups.\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 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\n2018+ BMW F90 M5 (incl. Competition)2018+ BMW F91\/F92\/F93 M8 (Coupe, Convertible, Gran Coupe)SKU: MAD-122\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":45444958388422,"sku":"MAD-122","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/0804\/8420\/files\/WhatsApp_Image_2025-08-20_at_12.21.20_c2cd3e44__41949.1756154316.386.513.jpg?v=1768321393","url":"https:\/\/www.graveyardperformance.com\/products\/mad-bmw-f9x-m5-m8-catted-downpipes-w-no-cel-guarantee","provider":"Graveyard Performance","version":"1.0","type":"link"}