{"product_id":"mad-bmw-s58-3-5-fat-boy-downpipes-m2-m3-m4-g87-g80-g82-g83","title":"MAD BMW S58 3.5\" Fat Boy Downpipes  M2 M3 M4  G87 G80 G82 G83","description":"\u003cp\u003eThe MAD 3.5\" S58 Fat Boy is the largest BMW S58 catless downpipe on the market. Upgrade from the stock S58 downpipes for maximum airflow, power and sound — eliminating the back-pressure caused by the factory catalytic converters so your turbos spool faster and reach maximum power. As a bonus, your car sounds a whole lot meaner.\u003c\/p\u003e\n\u003cp\u003eExpect up to a 30 HP increase on a tuned S58 with stock turbos — even more on upgraded turbos. The flex section reduces stress and unwanted vibration.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLargest 3.5\" diameter piping\u003c\/strong\u003e versus the standard 3\".\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\u003e2021+ BMW M3 (G80)\u003c\/li\u003e\n\u003cli\u003e2021+ BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2023+ BMW M2 (G87)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eSKU: MAD-047.\u003c\/em\u003e\u003c\/p\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":51574532440120,"sku":"MAD-047","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/IMG_1825__61931.1712353025.386.513.jpg?v=1764906732","url":"https:\/\/korespeed.com\/products\/mad-bmw-s58-3-5-fat-boy-downpipes-m2-m3-m4-g87-g80-g82-g83","provider":"KORE SPEED","version":"1.0","type":"link"}