{"product_id":"mad-bmw-b58-2025-gen-3-m340-m440-4-5-downpipe-catless","title":"MAD BMW B58 2025+ Gen 3 M340 M440 4.5\" Downpipe Catless","description":"\u003cp\u003eEnhance your 2025+ BMW M340 or M440 with the MAD B58 Gen 3 Catless Downpipe. Crafted from premium 304 stainless steel, this 4.5\" downpipe delivers optimal exhaust flow, durability and corrosion resistance for the best quality and longevity.\u003c\/p\u003e\n\u003cp\u003eBy eliminating the restrictive factory catalytic converters, it significantly boosts horsepower, sharpens throttle response and reduces turbo lag for a thrilling drive. Precision welds and exact fitment ensure a seamless, bolt-on installation with no modifications — and an aggressive, sporty exhaust note to match.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-grade 304 stainless steel construction.\u003c\/li\u003e\n\u003cli\u003e4.5-inch piping diameter for improved exhaust flow.\u003c\/li\u003e\n\u003cli\u003eSignificant boost in horsepower and torque.\u003c\/li\u003e\n\u003cli\u003eEnhanced throttle response and reduced turbo lag.\u003c\/li\u003e\n\u003cli\u003eAggressive, deep and sporty exhaust tone.\u003c\/li\u003e\n\u003cli\u003eEasy direct bolt-on installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2025+ BMW M340\u003c\/li\u003e\n\u003cli\u003e2025+ BMW M440\u003c\/li\u003e\n\u003cli\u003e2025+ BMW X3 M50 (G45)\u003c\/li\u003e\n\u003cli\u003e2025+ BMW X4 M50 (G46)\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":51574529982520,"sku":"MAD-126","price":259.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1775\/7947\/files\/WhatsApp_Image_2025-05-16_at_11.04.04_2b514f31__65100.1749140003.386.513.jpg?v=1764906209","url":"https:\/\/korespeed.com\/products\/mad-bmw-b58-2025-gen-3-m340-m440-4-5-downpipe-catless","provider":"KORE SPEED","version":"1.0","type":"link"}