{"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":"\u003cp\u003eThe MAD F9x Catted Downpipes unlock the real performance of the F90 M5 and F9x M8, swapping the restrictive factory downpipes for a high-flow catted design — now backed by a no-CEL guarantee. Expect quicker spool, freer flow and a deeper, more aggressive note.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e300-cell high-flow cats\u003c\/strong\u003e for the right balance of performance and street drivability.\u003c\/li\u003e\n\u003cli\u003eImproved exhaust flow, faster turbo response and sharper throttle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 30 HP\u003c\/strong\u003e on stock turbos — more with upgraded turbos.\u003c\/li\u003e\n\u003cli\u003eFlex section for added durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuild \u0026amp; fit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium 304 stainless steel, built to handle extreme heat.\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on with spot-on fitment — no cutting or welding.\u003c\/li\u003e\n\u003cli\u003eWorks with the stock exhaust and aftermarket systems, and with right- and left-hand-drive cars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNo-CEL guarantee \u0026amp; warranty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIf a check engine light appears due to the catalytic converter, MAD replaces the downpipes free — valid for 2 years from purchase.\u003c\/li\u003e\n\u003cli\u003eLifetime warranty still applies to manufacturer defects such as cracks in the pipe or welds.\u003c\/li\u003e\n\u003cli\u003e90-day return window; ships in 1–2 business days.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2018+ BMW F90 M5 (including Competition)\u003c\/li\u003e\n\u003cli\u003e2018+ BMW F91 \/ F92 \/ F93 M8 (Coupe, Convertible, Gran Coupe)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEmissions disclaimer:\u003c\/strong\u003e This product is not legal for sale or use on pollution-controlled vehicles operated on public roads and is intended for off-road, race, or closed-course competition use only. You are responsible for compliance with all applicable emissions laws; use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws. Please check your local regulations before purchase and installation.\u003c\/p\u003e\n\u003cp\u003eSourced by KORE SPEED — Canadian-owned. Fitment questions? \u003ca href=\"mailto:support@korespeed.com\"\u003esupport@korespeed.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":51574530932792,"sku":"MAD-122","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/WhatsApp_Image_2025-08-20_at_12.21.19_0dd829a6__87455.1756154316.386.513.jpg?v=1764906391","url":"https:\/\/korespeed.com\/products\/mad-bmw-f9x-m5-m8-catted-downpipes-w-no-cel-guarantee","provider":"KORE SPEED","version":"1.0","type":"link"}