{"product_id":"active-autowerke-active-aflow-catted-downpipes-bmw-s58-f97-f98-x3m-x4m-11-070a","title":"Active Autowerke Active Aflow Catted Downpipes – BMW S58 F97\/F98 X3M\/X4M 11-070A","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eActive Autowerke offers a performance downpipe upgrade specifically engineered for the BMW S58 engine in the F97\/F98 X3M and X4M models. This version is equipped with a pair of 4.5\" Active Aflow high-flow catalytic converters.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConstructed from TIG welded 304 stainless steel with 1.5mm wall thickness for durability\u003c\/li\u003e\n\u003cli\u003eFeatures 3 inch diameter piping to reduce exhaust restriction and improve turbo spool\u003c\/li\u003e\n\u003cli\u003eIncludes stainless flex joints, maintaining a minimum 70mm diameter to match OEM exhaust\u003c\/li\u003e\n\u003cli\u003ePrecision fitment with bolt-on installation\u003c\/li\u003e\n\u003cli\u003eManufactured in Miami, Florida\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x downpipe set with Active Aflow catalytic converters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe pair of 4.5\" Active Aflow ultra-high-flow catalytic converters (400 cells per square inch) are constructed from 304 stainless steel, rated for engines up to 800hp, withstand temperatures up to 1500°F, and are EPA registered and OBD2 compliant for 1996-and-newer vehicles — designed to run without a catalytic-efficiency check engine light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot legal for use on vehicles registered in California\u003c\/strong\u003e per California Vehicle Code Section 27156 and 38391 — meets EPA (not CARB) emissions standards.\u003c\/li\u003e\n\u003cli\u003eCovered by a 5-year\/50,000-mile warranty on shell and tube ends and a 2-year\/25,000-mile warranty on the catalytic core to the original purchaser only.\u003c\/li\u003e\n\u003cli\u003eNo performance tune is required to run this downpipe (per Active Autowerke).\u003c\/li\u003e\n\u003cli\u003eMinimizes back pressure on the turbochargers using a straightforward design with minimal bends, enhancing turbo spool speed and overall power potential.\u003c\/li\u003e\n\u003cli\u003eCompletes the Active Autowerke X3M\/X4M exhaust system — pair with a mid-pipe (\u003ca href=\"\/products\/active-autowerke-catted-midpipe-bmw-supra-b58-fits-f-g-chassis-up-to-2024\"\u003eSingle\u003c\/a\u003e or \u003ca href=\"\/products\/active-autowerke-equal-length-midpipe-bmw-s58-f97-f98-x3m-x4m\"\u003eEqual Length\u003c\/a\u003e) and the \u003ca href=\"\/products\/active-autowerke-valved-rear-axle-back-exhaust-f97-f98-x3m-x4m\"\u003eValved Rear Axle-Back Exhaust\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/Active_20Autowerke_20-_20Catalytic_20Converter_20-Break-In-_20Instructions.pdf?v=1785359499\" target=\"_blank\"\u003eCatalytic converter break-in procedure (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e11-070A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3 M (incl. Competition)\u003c\/td\u003e\n\u003ctd\u003eF97\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX4 M (incl. Competition)\u003c\/td\u003e\n\u003ctd\u003eF98\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020–2025\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":67600626549043,"sku":"11-070A","price":2279.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/Active-11-064.jpg?v=1781207718","url":"https:\/\/x58cartel.com\/products\/active-autowerke-active-aflow-catted-downpipes-bmw-s58-f97-f98-x3m-x4m-11-070a","provider":"x58Cartel","version":"1.0","type":"link"}