{"product_id":"mad-bmw-s55-3-5-fat-boy-downpipes-m2c-m3-m4-w-flex-section","title":"MAD BMW S55 3.5\" Fat Boy Downpipes M2C M3 M4 W\/ Flex Section","description":"\u003cp\u003eSay hello to the largest S55 downpipes on the market: the MAD S55 Fat Boy 3.5\" Catless Downpipes. Swapping the restrictive stock cats for full 3.5\" piping eliminates backpressure so the turbos spool faster and make maximum power — with a much meaner exhaust note. The flex section reduces stress and vibration from heat and engine movement.\u003c\/p\u003e\n\u003cp\u003eExpect up to a 30 HP increase on a tuned S55 with stock turbos, and even more on upgraded turbos.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLargest-diameter 3.5\" catless design for maximum flow.\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\u003e2018+ BMW M2 Competition\u003c\/li\u003e\n\u003cli\u003e2014+ BMW M3\u003c\/li\u003e\n\u003cli\u003e2015+ BMW M4\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":51574529327160,"sku":null,"price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/mad-2042-5__53559.1742409545.386.513.jpg?v=1764906076","url":"https:\/\/korespeed.com\/products\/mad-bmw-s55-3-5-fat-boy-downpipes-m2c-m3-m4-w-flex-section","provider":"KORE SPEED","version":"1.0","type":"link"}