{"product_id":"active-autowerke-aflow-catted-downpipes-f90-m5-f9x-m8","title":"Active Autowerke Aflow Catted Downpipes - F90 M5 | F9X M8","description":"\u003cdiv id=\"tab-description\" class=\"tab-content\"\u003e\n\u003cdiv id=\"tab-description-mobile\" class=\"toggle-content show-mobile\"\u003e\n\u003cp\u003eFor over 30 years, Active Autowerke has set the benchmark for BMW performance. The Aflow High-Flow Downpipes are built on that same principle: remove the single largest restriction in the S63TU exhaust path and let the turbos work.\u003c\/p\u003e\n\u003cp\u003eManufactured in-house in Miami, Florida from premium 304 stainless steel and TIG-welded throughout, each downpipe begins with a factory-matched 3.5” V-band inlet that tapers into a high-flow mandrel-bent body. The lower section other manufacturers sell separately as a mid-pipe is included here. OEM O2 sensor heat shield compatibility keeps the engine bay looking untouched.\u003c\/p\u003e\n\u003cp\u003eA pair of 4.5” Active Aflow catalytic converters carries a 400 cell per square inch ultra high-flow substrate that reaches operating efficiency within 9 seconds of startup. No CEL for catalytic efficiency, and no performance tune required to run them. The result is stronger power and torque across the band with noticeably less lag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo CEL for catalytic efficiency, guaranteed\u003c\/li\u003e\n\u003cli\u003eActive Aflow high-flow cats, EPA registered and OBD2 compliant (49 states)\u003c\/li\u003e\n\u003cli\u003e4.5” catalytic converters with 400 cpsi ultra high-flow substrate\u003c\/li\u003e\n\u003cli\u003eFactory-matched 3.5” V-band inlet into mandrel-bent body\u003c\/li\u003e\n\u003cli\u003eIncludes the lower mid-pipe section\u003c\/li\u003e\n\u003cli\u003eFaster turbo spool and improved throttle response\u003c\/li\u003e\n\u003cli\u003e304 stainless steel with TIG-welded construction\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on fit, no cutting or welding\u003c\/li\u003e\n\u003cli\u003eRetains OEM O2 sensor heat shield for a stealth look\u003c\/li\u003e\n\u003cli\u003eRated for up to 800 HP applications\u003c\/li\u003e\n\u003cli\u003eWithstands up to 1500°F\u003c\/li\u003e\n\u003cli\u003eReaches operating efficiency within 9 seconds of startup\u003c\/li\u003e\n\u003cli\u003eMade in Miami, Florida\u003c\/li\u003e\n\u003cli\u003e5-Year \/ 50,000-Mile Warranty on shell and tube ends, 2-Year \/ 25,000-Mile Warranty on catalytic core\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBMW M5 (F90) and M8 (F91 Convertible, F92 Coupe, F93 Gran Coupe), including Competition\u003c\/p\u003e\n\u003cp\u003eNot legal for sale or use on pollution-controlled motor vehicles registered in California per California Vehicle Code sections 27156 and 38391. Warranty on the catalytic core is void if the vehicle produces burble or overrun fueling in excess of stock, which physically destroys the catalyst.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":51467825676534,"sku":"11-063A","price":2279.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/F90cata_c692de2a-0e3b-4864-ba31-072a5449d197.jpg?v=1786748169","url":"https:\/\/autotecknic.com\/products\/active-autowerke-aflow-catted-downpipes-f90-m5-f9x-m8","provider":"AutoTecknic USA","version":"1.0","type":"link"}