{"product_id":"mad-b58-4-5-catted-downpipe-w-bracket-bmw-f-g-chassis-supra","title":"MAD B58 4.5\" Catted Downpipe W\/ Bracket BMW F, G Chassis \u0026 Supra","description":"\u003cp\u003eUpgrade the stock B58 downpipe to the MAD B58 4.5\" Catted Downpipe for more airflow, power and sound. Crafted from premium 304 stainless steel to handle extreme heat, its smooth piping transition frees up exhaust flow for more horsepower, torque and throttle response — while 200-cell high-flow cats keep things streetable.\u003c\/p\u003e\n\u003cp\u003eIt bolts directly onto the stock exhaust with no cutting or welding, and works with aftermarket systems too.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e200-cell high-flow catalytic converter.\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\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\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 not fit 2025+)\u003c\/li\u003e\n\u003cli\u003e2016+ BMW 440i, 540i \u0026amp; 740i (\u0026amp; xDrive)\u003c\/li\u003e\n\u003cli\u003e2017–2024 BMW X3 M40 \u0026amp; X4 M40 (G01\/G02)\u003c\/li\u003e\n\u003cli\u003e2019+ BMW X5 40i (G05), X7 40i (G07) \u0026amp; 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":51574529359928,"sku":"MAD-056","price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/PhotoRoom_001_20240111_114207__74764.1705008085.386.513.jpg?v=1764906110","url":"https:\/\/korespeed.com\/products\/mad-b58-4-5-catted-downpipe-w-bracket-bmw-f-g-chassis-supra","provider":"KORE SPEED","version":"1.0","type":"link"}