{"title":"B58 Gen 3 (Exhaust)","description":"\u003cp\u003eExhaust \u0026amp; Downpipes verified for the B58 Gen 3: cat-back exhausts, valved rear sections, downpipes, mid-pipes and tips. Fits the 2022+ mild-hybrid 5, 7 and X Series 40i and the facelifted M340i; every product page lists the exact chassis and years.\u003c\/p\u003e","products":[{"product_id":"active-autowerke-bmw-b58-gen-3-x-body-catted-downpipe-2025-and-newer","title":"Active Autowerke GESI Catted Downpipe – BMW B58 Gen 3 G-Series (2025+) 11-062N","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eHigh-performance catted exhaust downpipe for the single-turbo B58 Gen 3 (B58N) equipped BMW X-body platform. \u003cstrong\u003eThis is not for M340i and M440i B58N Gen 3 models, which use a different downpipe incorporating a new GPF (Gasoline Particulate Filter).\u003c\/strong\u003e No performance tune is needed for this downpipe.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e5\" diameter stainless steel piping, tapering to a stainless flex joint and down to 80mm to meet the OEM exhaust system — never drops below the stock 80mm diameter\u003c\/li\u003e\n\u003cli\u003eCasted upper stainless steel V-Band for precise fitment\u003c\/li\u003e\n\u003cli\u003eQuicker turbo spool\u003c\/li\u003e\n\u003cli\u003eDurable construction from TIG welded 304 stainless steel, 1.5mm wall thickness\u003c\/li\u003e\n\u003cli\u003eEasily bolts on, no cutting or welding required\u003c\/li\u003e\n\u003cli\u003eMade in Miami, Florida\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x catted downpipe with 5\" GESI high-flow catalytic converter\u003c\/li\u003e\n\u003cli\u003eTurbo flange gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe GESI G-Sport Ultra High Output catalytic converter features full 304 stainless steel construction including the substrate, is EPA registered and OBD2 compliant for 1996-and-newer vehicles, and is rated for up to 1,000hp.\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, 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; warranty is void if the vehicle has excessive burble (greater than stock), as this physically destroys the catalytic core.\u003c\/li\u003e\n\u003cli\u003eNo performance tune is needed for this downpipe.\u003c\/li\u003e\n\u003cli\u003ePrefer the Active AFlow cat? See the \u003ca href=\"\/products\/active-autowerke-aflow-catted-downpipe-bmw-b58-gen-3-g-series-2025-11-062na\"\u003eB58 Gen 3 G-Series AFlow Catted Downpipe (11-062NA)\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for M340i\/M440i Gen 3 (B58N)\u003c\/strong\u003e — those use a different downpipe incorporating a GPF; see the \u003ca href=\"\/products\/active-autowerke-gesi-catted-downpipe-bmw-b58n-m340i-m440i-2025-11-062g\"\u003eB58N M340i\/M440i GESI Catted Downpipe (11-062G)\u003c\/a\u003e. Fitment applies to US-model cars only unless specifically stated.\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\u003e11-062N\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 M50 xDrive\u003c\/td\u003e\n\u003ctd\u003eG45\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 40i\u003c\/td\u003e\n\u003ctd\u003eG05\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX7 40i\u003c\/td\u003e\n\u003ctd\u003eG07\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e540i\u003c\/td\u003e\n\u003ctd\u003eG60\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2024+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e740i\u003c\/td\u003e\n\u003ctd\u003eG70\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: not compatible with M340i or M440i Gen 3 (B58N) models — those use a different downpipe design incorporating a GPF. The Gen 3 540i is the current-generation G60 (2024+); the previous G30\/G31 540i (2017–2023) is a Gen 2 B58 and is not covered by this listing. The Gen 3 X3 is the new G45 X3 M50 xDrive (2025+); the previous G01 X3 is not covered.\u003c\/em\u003e\u003c\/p\u003e","brand":"Active Autowerke","offers":[{"title":"Catted DP w\/ Turbo Flange Gasket","offer_id":53736928608563,"sku":"11-062N","price":1999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/b58nc.jpg?v=1785199520"},{"product_id":"supersprint-rear-exhaust-bmw-m340i-g20-g21-b58","title":"Supersprint Rear Exhaust – BMW M340i (G20\/G21) B58","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Supersprint Racing rear exhaust for the B58 M340i is a 304 stainless section available with double-round 80mm tips or configured to retain the factory endpipes. Pairs with Supersprint downpipes and sections for a full system.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% AISI 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eModular Supersprint design — pairs with Supersprint downpipes, front and centre sections (sold separately)\u003c\/li\u003e\n\u003cli\u003eValved systems are plug-and-play with the factory ECU\u003c\/li\u003e\n\u003cli\u003eHandmade in Italy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSupersprint rear exhaust \/ muffler section (per selected option)\u003c\/li\u003e\n\u003cli\u003eClamps and mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePart of the modular Supersprint system — pair with the matching \u003ca href=\"https:\/\/x58cartel.com\/products\/supersprint-front-metallic-cats-r-l-m340i-m440i-m240i-g20-g22-g42-b58\"\u003eFront Metallic Cats\u003c\/a\u003e, \u003ca href=\"https:\/\/x58cartel.com\/products\/supersprint-front-pipes-r-l-m340i-m440i-m240i-g20-g22-g42-b58\"\u003eFront Pipes\u003c\/a\u003e, and \u003ca href=\"https:\/\/x58cartel.com\/products\/supersprint-centre-pipes-r-l-m340i-m440i-m240i-g20-g22-g42-b58\"\u003eCentre Pipes\u003c\/a\u003e for your model\u003c\/li\u003e\n\u003cli\u003eValved versions retain factory exhaust-valve control\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRacing, OO80 tips — 049826\u003c\/li\u003e\n\u003cli\u003eRacing, for OEM endpipes — 049804\u003c\/li\u003e\n\u003cli\u003eValved, OO90 tips — 527026\u003c\/li\u003e\n\u003cli\u003eValved, for OEM endpipes — 527004\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\u003eM340i (RWD)\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2019+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i xDrive\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2019+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM340i Touring\u003c\/td\u003e\n\u003ctd\u003eG21\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2019+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Supersprint","offers":[{"title":"Racing (OO80 Tips)","offer_id":53777294950707,"sku":"049826","price":3442.5,"currency_code":"USD","in_stock":true},{"title":"For OEM Endpipes","offer_id":53777294983475,"sku":"049804","price":2670.3,"currency_code":"USD","in_stock":true},{"title":"Valved, OO90 Tips","offer_id":53841023500595,"sku":"527026","price":4882.95,"currency_code":"USD","in_stock":true},{"title":"Valved, for OEM Endpipes","offer_id":53841023533363,"sku":"527004","price":4340.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/049826_3web-297210.jpg?v=1786567322"},{"product_id":"supersprint-valved-rear-exhaust-bmw-m440i-g22-g23-g26-b58","title":"Supersprint Valved Rear Exhaust – BMW M440i (G22\/G23\/G26) B58","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Supersprint valved rear exhaust for the B58 M440i is a 304 stainless section with factory-controlled valves, available with double-round 90mm tips or configured to retain the factory endpipes.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% AISI 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eModular Supersprint design — pairs with Supersprint downpipes, front and centre sections (sold separately)\u003c\/li\u003e\n\u003cli\u003eValved systems are plug-and-play with the factory ECU\u003c\/li\u003e\n\u003cli\u003eHandmade in Italy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSupersprint rear exhaust \/ muffler section (per selected option)\u003c\/li\u003e\n\u003cli\u003eClamps and mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePart of the modular Supersprint system — pair with the matching \u003ca href=\"https:\/\/x58cartel.com\/products\/supersprint-front-metallic-cats-r-l-m340i-m440i-m240i-g20-g22-g42-b58\"\u003eFront Metallic Cats\u003c\/a\u003e, \u003ca href=\"https:\/\/x58cartel.com\/products\/supersprint-front-pipes-r-l-m340i-m440i-m240i-g20-g22-g42-b58\"\u003eFront Pipes\u003c\/a\u003e, and \u003ca href=\"https:\/\/x58cartel.com\/products\/supersprint-centre-pipes-r-l-m340i-m440i-m240i-g20-g22-g42-b58\"\u003eCentre Pipes\u003c\/a\u003e for your model\u003c\/li\u003e\n\u003cli\u003eValved versions retain factory exhaust-valve control\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eValved, OO90 tips — 527126\u003c\/li\u003e\n\u003cli\u003eValved, for OEM endpipes — 527104\u003c\/li\u003e\n\u003cli\u003eRace, non-valved, OO80 tips — 049926\u003c\/li\u003e\n\u003cli\u003eRace, non-valved, for OEM endpipes — 049904\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\u003eM440i \/ M440i xDrive Coupe\u003c\/td\u003e\n\u003ctd\u003eG22\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i xDrive Convertible\u003c\/td\u003e\n\u003ctd\u003eG23\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i xDrive Gran Coupe\u003c\/td\u003e\n\u003ctd\u003eG26\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Supersprint","offers":[{"title":"Valved (OO90 Tips)","offer_id":53777295278387,"sku":"527126","price":4926.15,"currency_code":"USD","in_stock":true},{"title":"Valved (for OEM Endpipes)","offer_id":53777295311155,"sku":"527104","price":4392.9,"currency_code":"USD","in_stock":true},{"title":"Race, OO80 Tips (Non-Valved)","offer_id":53841023959347,"sku":"049926","price":3497.85,"currency_code":"USD","in_stock":true},{"title":"Race, for OEM Endpipes (Non-Valved)","offer_id":53841023992115,"sku":"049904","price":2721.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/527126.jpg?v=1786572054"},{"product_id":"milltek-cat-back-exhaust-bmw-m340i-m440i-g20-g22-g26-b58-oe-tips","title":"Milltek Cat-Back Exhaust – BMW M340i \/ M440i (G20\/G22\/G26) B58 – OE Tips","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Milltek cat-back for the B58 M340i and M440i is a resonated 76.2mm T304 stainless system finished with quad 100mm GT-100 tips. It adds a richer Milltek tone and reduced backpressure while remaining a road-friendly, resonated design that bolts on without cutting the OE system. Finished in OE Tips.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eT304 aircraft-grade stainless steel construction\u003c\/li\u003e\n\u003cli\u003eMandrel-bent, TIG-welded; hand-finished tips\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on — does not require the OE system to be cut (cat-back systems)\u003c\/li\u003e\n\u003cli\u003e76.2mm (3.0\") piping; quad 100mm GT-100 tailpipes\u003c\/li\u003e\n\u003cli\u003eResonated (road-legal class) — not a de-cat\u003c\/li\u003e\n\u003cli\u003eOptional Active Valve Control (Plug-and-Play remote, SSXBM1275)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMilltek resonated cat-back system\u003c\/li\u003e\n\u003cli\u003eQuad GT-100 tailpipes (per selected finish)\u003c\/li\u003e\n\u003cli\u003eClamps and fitting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOptional: Active Valve Control Plug-and-Play remote (SSXBM1275), sold separately\u003c\/li\u003e\n\u003cli\u003eResonated cat-back — retains the factory catalysts\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOE Tips — SSXBM1272\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\u003eM340i \/ M340i xDrive\u003c\/td\u003e\n\u003ctd\u003eG20 \/ G21\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440i xDrive\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23 \/ G26\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Milltek","offers":[{"title":"OE Tips","offer_id":53844918206771,"sku":"SSXBM1272","price":2757.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/SSXBM1272_1.jpg?v=1785624357"},{"product_id":"milltek-cat-back-exhaust-bmw-m340i-m440i-g20-g22-g26-b58-gt-100-polished","title":"Milltek Cat-Back Exhaust – BMW M340i \/ M440i (G20\/G22\/G26) B58 – GT-100 Polished","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Milltek cat-back for the B58 M340i and M440i is a resonated 76.2mm T304 stainless system finished with quad 100mm GT-100 tips. It adds a richer Milltek tone and reduced backpressure while remaining a road-friendly, resonated design that bolts on without cutting the OE system. Finished in GT-100 Polished.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eT304 aircraft-grade stainless steel construction\u003c\/li\u003e\n\u003cli\u003eMandrel-bent, TIG-welded; hand-finished tips\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on — does not require the OE system to be cut (cat-back systems)\u003c\/li\u003e\n\u003cli\u003e76.2mm (3.0\") piping; quad 100mm GT-100 tailpipes\u003c\/li\u003e\n\u003cli\u003eResonated (road-legal class) — not a de-cat\u003c\/li\u003e\n\u003cli\u003eOptional Active Valve Control (Plug-and-Play remote, SSXBM1275)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMilltek resonated cat-back system\u003c\/li\u003e\n\u003cli\u003eQuad GT-100 tailpipes (per selected finish)\u003c\/li\u003e\n\u003cli\u003eClamps and fitting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOptional: Active Valve Control Plug-and-Play remote (SSXBM1275), sold separately\u003c\/li\u003e\n\u003cli\u003eResonated cat-back — retains the factory catalysts\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGT-100 Polished — SSXBM1273\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\u003eM340i \/ M340i xDrive\u003c\/td\u003e\n\u003ctd\u003eG20 \/ G21\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440i xDrive\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23 \/ G26\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Milltek","offers":[{"title":"GT-100 Polished","offer_id":53844918337843,"sku":"SSXBM1273","price":3258.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/SSXBM1272_1.jpg?v=1785624357"},{"product_id":"milltek-cat-back-exhaust-bmw-m340i-m440i-g20-g22-g26-b58-gt-100-cerakote-black","title":"Milltek Cat-Back Exhaust – BMW M340i \/ M440i (G20\/G22\/G26) B58 – GT-100 Cerakote Black","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Milltek cat-back for the B58 M340i and M440i is a resonated 76.2mm T304 stainless system finished with quad 100mm GT-100 tips. It adds a richer Milltek tone and reduced backpressure while remaining a road-friendly, resonated design that bolts on without cutting the OE system. Finished in GT-100 Cerakote Black.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eT304 aircraft-grade stainless steel construction\u003c\/li\u003e\n\u003cli\u003eMandrel-bent, TIG-welded; hand-finished tips\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on — does not require the OE system to be cut (cat-back systems)\u003c\/li\u003e\n\u003cli\u003e76.2mm (3.0\") piping; quad 100mm GT-100 tailpipes\u003c\/li\u003e\n\u003cli\u003eResonated (road-legal class) — not a de-cat\u003c\/li\u003e\n\u003cli\u003eOptional Active Valve Control (Plug-and-Play remote, SSXBM1275)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMilltek resonated cat-back system\u003c\/li\u003e\n\u003cli\u003eQuad GT-100 tailpipes (per selected finish)\u003c\/li\u003e\n\u003cli\u003eClamps and fitting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOptional: Active Valve Control Plug-and-Play remote (SSXBM1275), sold separately\u003c\/li\u003e\n\u003cli\u003eResonated cat-back — retains the factory catalysts\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGT-100 Cerakote Black — SSXBM1274\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\u003eM340i \/ M340i xDrive\u003c\/td\u003e\n\u003ctd\u003eG20 \/ G21\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440i xDrive\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23 \/ G26\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 2 \/ Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Milltek","offers":[{"title":"GT-100 Cerakote Black","offer_id":53844918763827,"sku":"SSXBM1274","price":3512.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/SSXBM1272_1.jpg?v=1785624357"},{"product_id":"active-autowerke-aflow-catted-downpipe-bmw-b58-gen-3-g-series-2025-11-062na","title":"Active Autowerke AFlow Catted Downpipe – BMW B58 Gen 3 G-Series (2025+) 11-062NA","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eHigh-performance catted exhaust downpipe for the single-turbo B58 Gen 3 (B58N) equipped BMW X-body platform. \u003cstrong\u003eThis is not for M340i and M440i B58N Gen 3 models, which use a different downpipe incorporating a new GPF (Gasoline Particulate Filter).\u003c\/strong\u003e This version is equipped with Active Autowerke's own Active AFlow high-flow catalytic converter. No performance tune is needed for this downpipe.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e5\" diameter stainless steel piping, tapering to a stainless flex joint and down to 80mm to meet the OEM exhaust system — never drops below the stock 80mm diameter\u003c\/li\u003e\n\u003cli\u003eCasted upper stainless steel V-Band for precise fitment\u003c\/li\u003e\n\u003cli\u003eQuicker turbo spool\u003c\/li\u003e\n\u003cli\u003eDurable construction from TIG welded 304 stainless steel, 1.5mm wall thickness\u003c\/li\u003e\n\u003cli\u003eEasily bolts on, no cutting or welding required\u003c\/li\u003e\n\u003cli\u003eMade in Miami, Florida\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x catted downpipe with Active AFlow high-flow catalytic converter\u003c\/li\u003e\n\u003cli\u003eTurbo flange gasket (pre-installed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe Active AFlow ultra-high-flow catalytic converter (400 cells per square inch) features 304 stainless steel construction including the substrate, is rated for up to 950hp, withstands temperatures up to 1500°F, reaches operational efficiency within 9 seconds of startup, and is 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, 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; warranty is void if the vehicle has excessive burble (greater than stock), as this physically destroys the catalytic core.\u003c\/li\u003e\n\u003cli\u003eNo performance tune is needed for this downpipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for M340i\/M440i Gen 3 (B58N)\u003c\/strong\u003e — those use a different downpipe incorporating a GPF; see the \u003ca href=\"\/products\/active-autowerke-gesi-catted-downpipe-bmw-b58n-m340i-m440i-2025-11-062g\"\u003eB58N M340i\/M440i GESI Catted Downpipe\u003c\/a\u003e. Fitment applies to US-model cars only unless specifically stated.\u003c\/li\u003e\n\u003cli\u003ePrefer the GESI cat? See the \u003ca href=\"\/products\/active-autowerke-bmw-b58-gen-3-x-body-catted-downpipe-2025-and-newer\"\u003eB58 Gen 3 G-Series GESI Catted Downpipe (11-062N)\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\u003e11-062NA\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 M50 xDrive\u003c\/td\u003e\n\u003ctd\u003eG45\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 40i\u003c\/td\u003e\n\u003ctd\u003eG05\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX7 40i\u003c\/td\u003e\n\u003ctd\u003eG07\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e540i\u003c\/td\u003e\n\u003ctd\u003eG60\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2024+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e740i\u003c\/td\u003e\n\u003ctd\u003eG70\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: not compatible with M340i or M440i Gen 3 (B58N) models — those use a different downpipe design incorporating a GPF. The Gen 3 540i is the current-generation G60 (2024+); the previous G30\/G31 540i (2017–2023) is a Gen 2 B58 and is not covered by this listing. The Gen 3 X3 is the new G45 X3 M50 xDrive (2025+); the previous G01 X3 is not covered.\u003c\/em\u003e\u003c\/p\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":67600632054067,"sku":"11-062NA","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/b58nc.jpg?v=1785199520"},{"product_id":"active-autowerke-gesi-catted-downpipe-bmw-b58n-m340i-m440i-2025-11-062g","title":"Active Autowerke GESI Catted Downpipe – BMW B58N M340i\/M440i (2025+) 11-062G","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eHigh-performance catted exhaust downpipe for the 2025-and-newer BMW M340i and M440i with the single-turbo B58 Gen 3 (B58N) engine. These Gen 3 M340i\/M440i models integrate a GPF (Gasoline Particulate Filter) into the factory downpipe assembly — this Active Autowerke downpipe replaces that restrictive GPF unit with a 5\" high-flow GESI catalytic converter. No performance tune is needed for this downpipe.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e5\" diameter stainless steel piping, tapering down to 80mm to meet the OEM exhaust system\u003c\/li\u003e\n\u003cli\u003eDurable construction from TIG welded 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eQuicker turbo spool and reduced back pressure\u003c\/li\u003e\n\u003cli\u003eDirect replacement for the GPF-integrated factory downpipe\u003c\/li\u003e\n\u003cli\u003eMade in Miami, Florida\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x catted downpipe with 5\" GESI high-flow catalytic converter\u003c\/li\u003e\n\u003cli\u003eTurbo flange gasket (pre-installed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe 5\" GESI G-Sport Ultra High Output catalytic converter (400 cells per square inch) features full 304 stainless steel construction including the substrate, is rated for up to 1,000hp, withstands temperatures up to 1500°F, reaches operational efficiency within 9 seconds of startup, and is EPA registered and OBD2 compliant for 1996-and-newer vehicles.\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, 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; warranty is void if the vehicle has excessive burble (greater than stock), as this physically destroys the catalytic core.\u003c\/li\u003e\n\u003cli\u003eNo performance tune is needed for this downpipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation note (per Active Autowerke):\u003c\/strong\u003e installation requires approximately 9–10 hours of labor, including subframe removal — professional installation is strongly recommended.\u003c\/li\u003e\n\u003cli\u003eFor M340i\/M440i, pair with the Active Autowerke \u003ca href=\"\/products\/active-autowerke-charge-pipe-g-chassis-m340i-m440i-a90-supra-15-007\"\u003eB58 Charge Pipe\u003c\/a\u003e. For 2019–2024 Gen 2 M340i\/M440i, see the \u003ca href=\"\/products\/active-autowerke-signature-gesi-catted-downpipe-bmw-b58-f-g-chassis-up-to-2024-11-062\"\u003eB58 GESI Catted Downpipe (up to 2024)\u003c\/a\u003e. X-body \/ 5-Series \/ 7-Series Gen 3 owners should use the \u003ca href=\"\/products\/active-autowerke-bmw-b58-gen-3-x-body-catted-downpipe-2025-and-newer\"\u003eB58 Gen 3 G-Series GESI Catted Downpipe (11-062N)\u003c\/a\u003e. Fitment applies to US-model cars only unless specifically stated.\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\u003e11-062G\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\u003eM340i (incl. xDrive)\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 (B58N) 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i (incl. xDrive)\u003c\/td\u003e\n\u003ctd\u003eG22\u003c\/td\u003e\n\u003ctd\u003eB58 Gen 3 (B58N) 3.0L\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: for the 2025+ B58N Gen 3 M340i\/M440i with the GPF-integrated factory downpipe only. 2019–2024 Gen 2 B58 M340i\/M440i models use the B58 GESI Catted Downpipe (11-062) instead.\u003c\/em\u003e\u003c\/p\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":67600632316211,"sku":"11-062G","price":2499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/b58gc.jpg?v=1790887509"}],"url":"https:\/\/x58cartel.com\/collections\/b58-gen-3-exhaust.oembed","provider":"x58Cartel","version":"1.0","type":"link"}