{"title":"BMW M440i G23 Exhaust \u0026 Downpipes","description":null,"products":[{"product_id":"dinan-free-flow-axle-back-exhaust-2019-2022-bmw-m340i-m440i","title":"Dinan Free Flow Axle-Back Exhaust – BMW M340i \/ M440i (B58)","description":"\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eQuad exhaust tips have long been a signature of BMW's most powerful letter, and a feature Dinan has traditionally reserved for M cars that already wore four tips from the factory. That changes with the Dinan Free Flow Axle-Back Exhaust for the G20 M340i and G22 M440i: the B58 platform earns the distinction, and the factory valance cleanly accommodates four 102mm straight-cut tips, offered in black ceramic coated or polished, laser engraved finishes.\u003c\/p\u003e\n\u003cp\u003eThe move to four tips also drove a change in valve strategy — Dinan integrated a second valve for symmetry and sound, in place of the factory's single valve that routes all gas out one tip when closed. Built entirely from TIG welded, brushed T304 stainless steel with larger 76mm tubing, the system delivers a deep, meaty tone through both outer pipes with the valves open, while closed valves force gas into the muffler for a quieter, drone-tamed cruise.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum gain of +6 HP @ 6600 RPM (Dinan measured)\u003c\/li\u003e\n\u003cli\u003eMaximum gain of +5 lb-ft of torque @ 6600 RPM (Dinan measured)\u003c\/li\u003e\n\u003cli\u003e100% T304 stainless steel construction, TIG welded and brushed\u003c\/li\u003e\n\u003cli\u003e76mm main tubing versus 70mm factory tubing\u003c\/li\u003e\n\u003cli\u003eQuad 102mm (4 in.) clamp-on, double-walled, laser engraved tips in polished stainless or black ceramic coating\u003c\/li\u003e\n\u003cli\u003e4 lbs lighter than the factory system\u003c\/li\u003e\n\u003cli\u003eTwin computer-controlled exhaust valves, 76mm diameter, approximately 30% less restrictive than the OE valves\u003c\/li\u003e\n\u003cli\u003eFactory exhaust valve actuator is reused and a second valve and actuator is added to the opposite side for even flow in either valve position\u003c\/li\u003e\n\u003cli\u003eDrone abatement technologies inside the muffler to limit low-RPM cabin resonance\u003c\/li\u003e\n\u003cli\u003eDinan published installation time: 2.5 hours\u003c\/li\u003e\n\u003cli\u003eEmissions status per Dinan: \"This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.\"\u003c\/li\u003e\n\u003cli\u003eDinan warranty: the remainder of the BMW new-car limited warranty (up to 4 years \/ 50,000 miles) or 2 years \/ unlimited mileage from purchase, whichever is greater; wear items, maintenance parts, improper installation and competition use are excluded\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDinan muffler assembly\u003c\/li\u003e\n\u003cli\u003eLeft and right inlet pipes\u003c\/li\u003e\n\u003cli\u003eFour exhaust tips\u003c\/li\u003e\n\u003cli\u003eHardware kit with clamps, valve mounts, limiters, fasteners and washers\u003c\/li\u003e\n\u003cli\u003eExhaust valve actuator kit for G20 models, including one D661-0033 exhaust valve motor and related components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e Dinan specifies no additional hardware for this part; all required mounting hardware is supplied with the kit.\u003c\/li\u003e\n\u003cli\u003eInstaller-supplied tools only. Dinan lists torque specifications throughout the instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/d660-0085_r5.pdf?v=1788302516\"\u003eDinan D660-0085 \/ D660-0085-BLK Free Flow Axle-Back Exhaust installation instructions (INS660-0085, Rev. F)\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eD660-0085\u003c\/strong\u003e – polished, laser engraved stainless tips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD660-0085-BLK\u003c\/strong\u003e – black ceramic coated tips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\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\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\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\u003eM440i \/ M440i xDrive\u003c\/td\u003e\n\u003ctd\u003eG22\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2021–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440i xDrive Convertible\u003c\/td\u003e\n\u003ctd\u003eG23\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2021–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM440i \/ M440i xDrive Gran Coupe\u003c\/td\u003e\n\u003ctd\u003eG26\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2022–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n","brand":"Dinan","offers":[{"title":"Black Ceramic Coated","offer_id":42760175485094,"sku":"D660-0085-BLK","price":2399.95,"currency_code":"USD","in_stock":true},{"title":"Polished","offer_id":42760175550630,"sku":"D660-0085","price":2349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/products\/d660-0085_1.jpg?v=1652486784"},{"product_id":"active-autowerke-midpipe-active-brace-bmw-m340i-m440i-g2x-g3x","title":"Active Autowerke Mid-Pipe w\/ Active Brace – BMW M340i \/ M440i (G2X \/ G3X, B58)","description":"\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Active Autowerke mid-pipe deletes the resonator in the Y-section of the factory mid-pipe on the G-chassis M340i and M440i, opening up a deeper tone. It is built from 304 stainless steel in the USA and ships with an Active Autowerke chassis brace (the G2X brace on 2024-and-older cars, the Active brace on 2025+ cars), which restores chassis rigidity while adding clearance for the larger piping.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eResonator-delete mid-pipe section\u003c\/li\u003e\n\u003cli\u003e304 stainless steel, made in the USA\u003c\/li\u003e\n\u003cli\u003eEach unit test-fit on Active Autowerke's M340i \/ M440i exhaust fixture\u003c\/li\u003e\n\u003cli\u003eIncludes the matching chassis brace: G2X brace (2024 and older variant) or Active brace (2025+ variant)\u003c\/li\u003e\n\u003cli\u003eNot a catalytic component; not valved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMid-pipe section\u003c\/li\u003e\n\u003cli\u003eChassis brace (G2X brace for 2024 and older; Active brace for 2025+)\u003c\/li\u003e\n\u003cli\u003eAll connecting and installation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e The brace and connecting hardware are included. Installing the mid-pipe alone requires cutting the factory system; no cutting is needed when paired with the Active Autowerke rear axle-back.\u003c\/li\u003e\n\u003cli\u003eOptional: pair with the \u003ca href=\"\/products\/active-autowerke-valved-rear-axle-back-exhaust-bmw-m340i-m440i-g2x-g3x\"\u003eActive Autowerke Valved Rear Axle-Back Exhaust (M340i \/ M440i)\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/community\/contact?service=Parts+Install\"\u003eRequest an Install Appointment\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect the variant that matches your model year: \u003cstrong\u003e2024 and older w G2X brace\u003c\/strong\u003e (11-128) or \u003cstrong\u003e2025+ w Active Brace\u003c\/strong\u003e (11-128N).\u003c\/li\u003e\n\u003cli\u003eDoes not fit the M440i Gran Coupe (G26).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e11-128\u003c\/strong\u003e — 2024 and older w G2X brace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11-128N\u003c\/strong\u003e — 2025+ w Active Brace\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\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\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\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\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"2024 and older w G2X brace","offer_id":52563474579736,"sku":"11-128","price":759.05,"currency_code":"USD","in_stock":true},{"title":"2025+ w Active Brace","offer_id":52786711920920,"sku":"11-128N","price":759.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/m340i1.jpg?v=1787607083"},{"product_id":"active-autowerke-valved-rear-axle-back-exhaust-bmw-m340i-m440i-g2x-g3x","title":"Active Autowerke Valved Rear Axle-Back Exhaust – BMW M340i \/ M440i (G2X \/ G3X, B58)","description":"\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe Active Autowerke valved rear axle-back exhaust for the G-chassis M340i and M440i reuses the factory valve actuator for OEM-style valve control and exits through quad tips. It is built from 304 stainless steel in the USA and deepens the tone over stock while keeping full drivability.\u003c\/p\u003e\n\u003cp\u003eTips are offered in stainless brushed, matte black, carbon fiber, and carbon over black.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eValved rear axle-back; reuses the OEM valve actuator\u003c\/li\u003e\n\u003cli\u003e304 stainless steel, made in the USA\u003c\/li\u003e\n\u003cli\u003eEach unit test-fit on Active Autowerke's M340i\/M440i exhaust fixture\u003c\/li\u003e\n\u003cli\u003eQuad exhaust tips (finish varies by option)\u003c\/li\u003e\n\u003cli\u003eNot a catalytic component\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRear axle-back exhaust section with quad tips\u003c\/li\u003e\n\u003cli\u003eConnecting hardware for the mid-pipe\u003c\/li\u003e\n\u003cli\u003eAll necessary installation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone required.\u003c\/strong\u003e Installed alone this exhaust requires cutting the factory mid-pipes.\u003c\/li\u003e\n\u003cli\u003eOptional: pair with the \u003ca href=\"\/products\/active-autowerke-midpipe-active-brace-bmw-m340i-m440i-g2x-g3x\"\u003eActive Autowerke Mid-Pipe w\/ Active Brace (M340i \/ M440i)\u003c\/a\u003e to avoid cutting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=57Ta3uSB2b8\"\u003eActive Autowerke — G2X Exhaust Installation Video (YouTube)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTip finish is selected at the variant level.\u003c\/li\u003e\n\u003cli\u003eOn 2025+ (B58N) cars the volume increase is smaller due to the GPF in the downpipe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e11-089\u003c\/strong\u003e — stainless brushed tips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11-089B\u003c\/strong\u003e — matte black tips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11-089C\u003c\/strong\u003e — carbon fiber tips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\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\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\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\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23 \/ G26\u003c\/td\u003e\n\u003ctd\u003eB58 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"Stainless Brushed","offer_id":52563476807960,"sku":"11-089","price":1899.05,"currency_code":"USD","in_stock":true},{"title":"Matte Black","offer_id":52563476873496,"sku":"11-089","price":1899.05,"currency_code":"USD","in_stock":true},{"title":"Carbon Fiber","offer_id":52563476906264,"sku":"11-089","price":2279.05,"currency_code":"USD","in_stock":true},{"title":"Carbon over Black","offer_id":52563476939032,"sku":"11-089","price":2279.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/G340-440reara.jpg?v=1787607149"},{"product_id":"active-autowerke-b58n-gesi-catted-downpipe-bmw-m340i-m440i-2025","title":"Active Autowerke B58N GESI Catted Downpipe – BMW M340i \/ M440i (2025+)","description":"\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThis Active Autowerke downpipe is engineered for the 2025-and-newer B58N (Gen-3) M340i and M440i, which use an integrated gasoline particulate filter. It replaces the factory GPF downpipe with a 5 inch stainless steel unit running a GESI high-flow catalyst, joined by a cast V-band and tapering to the OEM 80mm connection.\u003c\/p\u003e\n\u003cp\u003eTIG-welded from 304 stainless steel with a 1.5mm wall, rated for builds up to 1000 horsepower, with no check-engine light and no performance tune needed.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e5\" GESI G-Sport Ultra High Output catalytic converter, 400 cells per square inch — catted, no CEL\u003c\/li\u003e\n\u003cli\u003e5\" stainless steel, cast upper stainless V-band, stainless flex joint, tapering to 80mm OEM connection (never below the stock 80mm)\u003c\/li\u003e\n\u003cli\u003e304 stainless steel, TIG-welded, 1.5mm wall; full 304 stainless converter including substrate, furnace-brazed to the mantle\u003c\/li\u003e\n\u003cli\u003eRated for builds up to 1000 hp\u003c\/li\u003e\n\u003cli\u003eWithstands up to 1500°F; reaches operating efficiency within 9 seconds of start-up\u003c\/li\u003e\n\u003cli\u003eBolts on — no cutting or welding required; no performance tune needed\u003c\/li\u003e\n\u003cli\u003eEPA registered and fully OBD2 compliant (1996 and newer) in 49 states — not legal in California\u003c\/li\u003e\n\u003cli\u003eWarranty: 5 yr \/ 50,000 mi on shell and tube ends; 2 yr \/ 25,000 mi on the catalytic core; original purchaser only; void with louder-than-stock burble\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\u003eCatted downpipe with integrated GESI catalyst\u003c\/li\u003e\n\u003cli\u003eCast V-band connection\u003c\/li\u003e\n\u003cli\u003eTurbo flange gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e Bolt-on; no cutting or welding, and Active Autowerke states no performance tune is needed.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/active-autowerke-catalytic-converter-break-in-instructions.pdf?v=1787172533\"\u003eActive Autowerke catalytic converter break-in instructions (PDF)\u003c\/a\u003e — follow this procedure on first start-up to avoid a check engine light being set in error.\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/community\/contact?service=Parts+Install\"\u003eRequest an Install Appointment\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces the OEM GPF downpipe; removing the stock GPF downpipe takes roughly 9–10 hours because the subframe must be dropped.\u003c\/li\u003e\n\u003cli\u003eFits 2025+ B58N M340i \/ M440i only.\u003c\/li\u003e\n\u003cli\u003eFitment applies to US-model cars only.\u003c\/li\u003e\n\u003cli\u003eEPA compliant in 49 states; not legal for sale or use in California (California Vehicle Code Sections 27156 and 38391).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e\u003cstrong\u003e11-062G\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\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\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58N 3.0L Turbo I6\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\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23 \/ G26\u003c\/td\u003e\n\u003ctd\u003eB58N 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":52563477397784,"sku":"11-062G","price":2374.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/b58ga_cd453195-6df5-447f-be43-34419f9503b8.jpg?v=1787607244"},{"product_id":"active-autowerke-b58n-aflow-catted-downpipe-bmw-m340i-m440i-2025","title":"Active Autowerke B58N AFlow Catted Downpipe – BMW M340i \/ M440i (2025+)","description":"\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThis Active Autowerke downpipe fits the 2025-and-newer B58N (Gen-3) M340i and M440i with integrated GPF. It replaces the factory GPF downpipe with a 5 inch stainless steel unit running Active Autowerke's in-house AFlow high-flow catalyst, joined by a cast V-band and tapering to the OEM 80mm connection.\u003c\/p\u003e\n\u003cp\u003eTIG-welded from 304 stainless steel, rated to withstand 1500°F and reach catalytic efficiency within about 9 seconds, for builds up to 950 horsepower, with no check-engine light and no performance tune needed.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e5\" Active AFlow high-flow catalytic converter (in-house, not GESI), 400 cells per square inch — catted, no CEL\u003c\/li\u003e\n\u003cli\u003e5\" stainless steel, cast upper stainless V-band, stainless flex joint, tapering to 80mm OEM connection (never below the stock 80mm)\u003c\/li\u003e\n\u003cli\u003e304 stainless steel, TIG-welded, 1.5mm wall; full 304 stainless converter including substrate\u003c\/li\u003e\n\u003cli\u003eRated for builds up to 950 hp\u003c\/li\u003e\n\u003cli\u003eWithstands up to 1500°F; reaches operating efficiency within 9 seconds of start-up\u003c\/li\u003e\n\u003cli\u003eBolts on — no cutting or welding required; no performance tune needed\u003c\/li\u003e\n\u003cli\u003eEPA registered and fully OBD2 compliant (1996 and newer) in 49 states — not legal in California\u003c\/li\u003e\n\u003cli\u003eWarranty: 5 yr \/ 50,000 mi on shell and tube ends; 2 yr \/ 25,000 mi on the catalytic core; original purchaser only; void with louder-than-stock burble\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\u003eCatted AFlow downpipe\u003c\/li\u003e\n\u003cli\u003eCast V-band connection\u003c\/li\u003e\n\u003cli\u003eTurbo flange gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e Bolt-on; no cutting or welding, and Active Autowerke states no performance tune is needed.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/active-autowerke-catalytic-converter-break-in-instructions.pdf?v=1787172533\"\u003eActive Autowerke catalytic converter break-in instructions (PDF)\u003c\/a\u003e — follow this procedure on first start-up to avoid a check engine light being set in error.\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/community\/contact?service=Parts+Install\"\u003eRequest an Install Appointment\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces the OEM GPF downpipe; removing the stock GPF downpipe takes roughly 9–10 hours because the subframe must be dropped.\u003c\/li\u003e\n\u003cli\u003eFits 2025+ B58N M340i \/ M440i only.\u003c\/li\u003e\n\u003cli\u003eFitment applies to US-model cars only.\u003c\/li\u003e\n\u003cli\u003eEPA compliant in 49 states; not legal for sale or use in California (California Vehicle Code Sections 27156 and 38391).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e\u003cstrong\u003e11-062GA\u003c\/strong\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\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\u003c\/td\u003e\n\u003ctd\u003eG20\u003c\/td\u003e\n\u003ctd\u003eB58N 3.0L Turbo I6\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\u003c\/td\u003e\n\u003ctd\u003eG22 \/ G23 \/ G26\u003c\/td\u003e\n\u003ctd\u003eB58N 3.0L Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2025+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":52563477430552,"sku":"11-062GA","price":1899.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/b58ga.jpg?v=1787607244"}],"url":"https:\/\/speedlogicauto.com\/collections\/bmw-m440i-g23-exhaust.oembed","provider":"SPEED LOGIC","version":"1.0","type":"link"}