{"product_id":"mad-b58-v2-4-5-downpipe-w-bracket-bmw-f-g-chassis-supra","title":"MAD B58 V2 4.5\" Downpipe W\/ Bracket BMW F, G Chassis \u0026 Supra","description":"\u003cp\u003eUpgrade from the stock B58 downpipe to the MAD B58 V2 4.5\" Catless Downpipe for maximum airflow, power and sound. Constructed from high-quality 304 stainless steel, the catless design removes the restrictive catalytic converter to cut back-pressure, improve turbo spool and deliver a noticeable jump in power, throttle response and exhaust note.\u003c\/p\u003e\n\u003cp\u003eExpect up to a 30 HP increase on a tuned B58 with stock turbos — even more on upgraded turbos. It's a direct bolt-on replacement that works seamlessly with the factory exhaust, and it includes a mounting bracket.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLarge 4.5\" catless design in 304 stainless steel.\u003c\/li\u003e\n\u003cli\u003eIncludes mounting bracket.\u003c\/li\u003e\n\u003cli\u003eCompatible with right- and left-hand-drive vehicles.\u003c\/li\u003e\n\u003cli\u003eSmooth bends for maximum airflow with no drone, plus a flex section.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 30 HP\u003c\/strong\u003e on stock turbos — even more with upgraded turbos.\u003c\/li\u003e\n\u003cli\u003eLifetime warranty on defects and fitment; 90-day return; ships in 1–2 business days; spot-on fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2015+ BMW M240i \u0026amp; xDrive\u003c\/li\u003e\n\u003cli\u003e2016–2019 BMW 340i \u0026amp; xDrive\u003c\/li\u003e\n\u003cli\u003e2020–2024 BMW M340i \u0026amp; xDrive (does \u003cstrong\u003enot\u003c\/strong\u003e fit 2025)\u003c\/li\u003e\n\u003cli\u003e2016+ BMW 440i \u0026amp; xDrive\u003c\/li\u003e\n\u003cli\u003e2016+ BMW 540i \u0026amp; xDrive\u003c\/li\u003e\n\u003cli\u003e2016+ BMW 740i \u0026amp; xDrive\u003c\/li\u003e\n\u003cli\u003e2017–2024 BMW X3 M40 (G01) \u0026amp; X4 M40 (G02)\u003c\/li\u003e\n\u003cli\u003e2019+ BMW X5 40i (G05) \u0026amp; X7 40i (G07), xDrive\u003c\/li\u003e\n\u003cli\u003e2019+ BMW Z4 M40i (G29)\u003c\/li\u003e\n\u003cli\u003e2019+ Toyota Supra 3.0L\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 laws before purchase and installation.\u003c\/p\u003e\n\u003cp\u003eShips from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email \u003ca href=\"mailto:support@korespeed.com\"\u003esupport@korespeed.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":51574528081976,"sku":"MAD-007","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/MAD-2007_2__62175.1706204001.386.513.jpg?v=1764905932","url":"https:\/\/korespeed.com\/products\/mad-b58-v2-4-5-downpipe-w-bracket-bmw-f-g-chassis-supra","provider":"KORE SPEED","version":"1.0","type":"link"}