{"product_id":"mad-bmw-toyota-b58-fat-boy-5-catless-downpipe-m240-340-440-supra","title":"MAD BMW Toyota B58 Fat Boy 5\" Catless Downpipe M240 340 440  Supra","description":"\u003cp\u003eMeet the MAD B58 Fat Boy 5\" Catless Downpipe. With a massive 5-inch diameter, it provides unrestricted exhaust flow that slashes backpressure and unlocks more horsepower and torque — while the catless design and big bore deliver a deeper, far more aggressive sound. Premium stainless steel construction handles the heat and pressure of hard driving for years.\u003c\/p\u003e\n\u003cp\u003eExpect up to a 30 HP increase on a tuned B58 with the stock turbo, and even more on an upgraded turbo. Installation is straightforward with basic hand tools.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMassive 5\" catless design for maximum flow and sound.\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":51574532767800,"sku":"MAD-052","price":319.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/MAD-2052_4__39126.1706204262.386.513.jpg?v=1764906801","url":"https:\/\/korespeed.com\/products\/mad-bmw-toyota-b58-fat-boy-5-catless-downpipe-m240-340-440-supra","provider":"KORE SPEED","version":"1.0","type":"link"}