{"product_id":"mad-300-cell-race-catted-downpipes-bmw-f90-m5-f91-f92-f93-m8-w-no-cel-guarantee","title":"MAD 300-Cell Race Catted Downpipes | BMW F90 M5 | F91\/F92\/F93 M8 W\/ No CEL Guarantee","description":"\u003ch3\u003eMAD 300-Cell Race Catted Downpipes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBMW F90 M5 | BMW F91\/F92\/F93 M8\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eImprove exhaust flow, turbo response, and sound while retaining high-flow catalytic converters with the MAD 300-Cell Race Catted Downpipes. Designed for S63-powered BMW M5 and M8 models, these downpipes replace the restrictive factory primary downpipes with a performance-focused, direct-fit upgrade.\u003c\/p\u003e\n\u003cp\u003eConstructed from premium 304 stainless steel, each downpipe is engineered to withstand extreme exhaust temperatures while providing long-term strength and durability. Smooth bends and optimized transitions help reduce backpressure, improve turbo spool, and support stronger throttle response.\u003c\/p\u003e\n\u003cp\u003eThe integrated 300-cell high-flow catalytic converters provide a balance between increased performance, aggressive sound, and everyday drivability. MAD also includes a limited No CEL Guarantee for catalytic-converter-related check-engine lights.\u003c\/p\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium 304 stainless-steel construction\u003c\/li\u003e\n\u003cli\u003eIntegrated 300-cell high-flow catalytic converters\u003c\/li\u003e\n\u003cli\u003eIncreased exhaust-flow capacity\u003c\/li\u003e\n\u003cli\u003eReduced exhaust backpressure\u003c\/li\u003e\n\u003cli\u003eSupports quicker turbo spool\u003c\/li\u003e\n\u003cli\u003eImproved throttle-response potential\u003c\/li\u003e\n\u003cli\u003eDeeper and more aggressive exhaust tone\u003c\/li\u003e\n\u003cli\u003eDesigned to minimize unwanted drone\u003c\/li\u003e\n\u003cli\u003eIntegrated flex sections for added durability\u003c\/li\u003e\n\u003cli\u003eCompatible with right-hand-drive and left-hand-drive vehicles\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation\u003c\/li\u003e\n\u003cli\u003eNo cutting or welding required\u003c\/li\u003e\n\u003cli\u003eCompatible with factory and aftermarket exhaust systems\u003c\/li\u003e\n\u003cli\u003eSpot-on vehicle-specific fitment\u003c\/li\u003e\n\u003cli\u003eLifetime warranty against manufacturing defects and fitment issues\u003c\/li\u003e\n\u003cli\u003e90-day return period\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePotential gains of up to 30 horsepower with factory turbochargers\u003c\/li\u003e\n\u003cli\u003eAdditional power potential with upgraded turbochargers\u003c\/li\u003e\n\u003cli\u003eImproved exhaust flow\u003c\/li\u003e\n\u003cli\u003eFaster turbocharger response\u003c\/li\u003e\n\u003cli\u003eMore aggressive exhaust sound\u003c\/li\u003e\n\u003cli\u003eIncreased horsepower and torque potential\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eActual performance results depend on tuning, fuel, supporting modifications, vehicle condition, and testing method.\u003c\/p\u003e\n\u003ch3\u003eNo CEL Guarantee\u003c\/h3\u003e\n\u003cp\u003eMAD provides a \u003cstrong\u003eone-year No CEL Guarantee\u003c\/strong\u003e from the original purchase date.\u003c\/p\u003e\n\u003cp\u003eIf a check-engine light occurs specifically because of a catalytic-converter efficiency fault, MAD states that the affected downpipe will be replaced at no charge under the terms of its guarantee.\u003c\/p\u003e\n\u003cp\u003eThe lifetime warranty remains applicable to qualifying manufacturing defects, including cracks in the piping or welds.\u003c\/p\u003e\n\u003cp\u003eThe No CEL Guarantee does not necessarily cover warning lights caused by oxygen sensors, wiring, installation errors, exhaust leaks, tuning, or unrelated vehicle faults.\u003c\/p\u003e\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBMW M5 (F90)\u003c\/li\u003e\n\u003cli\u003eBMW M8 Convertible (F91)\u003c\/li\u003e\n\u003cli\u003eBMW M8 Coupe (F92)\u003c\/li\u003e\n\u003cli\u003eBMW M8 Gran Coupe (F93)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEngine:\u003c\/strong\u003e S63 Twin-Turbo V8\u003c\/p\u003e\n\u003ch3\u003eImportant Legal Notice\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRace use only.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHigh-flow catalytic converters do not guarantee emissions compliance or road legality. Local emissions and vehicle-equipment laws vary, and the purchaser is responsible for confirming legal use in their location.\u003c\/p\u003e\n\u003ch3\u003eAvailability\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIn Stock \u0026amp; Ready to Ship\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrders generally ship within \u003cstrong\u003e1–2 business days\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eProfessional installation by a qualified BMW performance shop is strongly recommended. Proper exhaust alignment, leak inspection, oxygen-sensor installation, and clearance verification are required.\u003c\/p\u003e\n\u003cp\u003eUproar Customs does not provide installation instructions, tuning, emissions-compliance advice, or technical support for self-installation.\u003c\/p\u003e","brand":"Uproar Customs","offers":[{"title":"Default Title","offer_id":47288299552937,"sku":null,"price":1399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0701\/1575\/4153\/files\/mad-exhaust-mad-bmw-f9x-m5-m8-catted-downpipes-w-no-cel-guarantee-1190421609.webp?v=1784925475","url":"https:\/\/www.uproarcustoms.com\/products\/mad-300-cell-race-catted-downpipes-bmw-f90-m5-f91-f92-f93-m8-w-no-cel-guarantee","provider":"Uproar Customs","version":"1.0","type":"link"}