{"product_id":"mad-bmw-b58-2025-gen-3-m340-m440-fat-boy-5-0-downpipe-catless","title":"MAD BMW B58 2025+ Gen 3 M340 M440 Fat Boy 5.0\" Downpipe Catless","description":"\u003cdiv class=\"flex flex-grow flex-col gap-3\"\u003e \u003cdiv class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap break-words\"\u003e \u003cdiv class=\"markdown prose w-full break-words dark:prose-invert light\"\u003e \u003cp data-end=\"399\" data-start=\"26\"\u003eUpgrade your 2025+ BMW M340 M440 with the MAD BMW B58 Gen 3 \"Fat Boy\" 5.0\" Catless Downpipe—the ultimate performance upgrade designed to unleash the full potential of your engine. Crafted from premium-quality 304 stainless steel, this larger-diameter 5.0-inch downpipe offers superior airflow, delivering enhanced horsepower, quicker turbo response, and noticeable torque gains.\u003c\/p\u003e \u003cp data-end=\"732\" data-start=\"401\"\u003eThe increased diameter of the \"Fat Boy\" downpipe sets it apart from our standard catless models by providing a deeper, richer, and significantly more aggressive exhaust tone. Precision-engineered welds and exceptional craftsmanship ensure perfect fitment, durability, and peak performance for enthusiasts demanding maximum results.\u003c\/p\u003e \u003cp data-end=\"919\" data-start=\"734\"\u003eTransform your BMW M340's driving experience by choosing MAD's top-tier downpipe, designed specifically for drivers seeking ultimate airflow and a sound profile that commands attention.\u003c\/p\u003e \u003cp data-end=\"934\" data-start=\"921\"\u003e\u003cstrong data-end=\"934\" data-start=\"921\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul data-end=\"1309\" data-start=\"936\"\u003e \u003cli data-end=\"989\" data-start=\"936\"\u003e Premium 304 stainless steel for superior durability \u003c\/li\u003e \u003cli data-end=\"1056\" data-start=\"990\"\u003e Expanded 5.0-inch diameter for unmatched airflow and performance \u003c\/li\u003e \u003cli data-end=\"1107\" data-start=\"1057\"\u003e Deeper, richer, and more aggressive exhaust tone \u003c\/li\u003e \u003cli data-end=\"1179\" data-start=\"1108\"\u003e Improved horsepower and torque compared to standard catless downpipes \u003c\/li\u003e \u003cli data-end=\"1233\" data-start=\"1180\"\u003e Precision craftsmanship and perfect bolt-on fitment \u003c\/li\u003e \u003cli data-end=\"1309\" data-start=\"1234\"\u003e Ideal for high-performance builds and enthusiasts seeking maximum results \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFitment:\u003c\/p\u003e \u003cp data-renderer-start-pos=\"11\"\u003eDoes not fit euro models (check downpipe flange design before ordering)\u003c\/p\u003e \u003cp\u003e2025+ BMW M340\u003c\/p\u003e \u003cp\u003e2025+ BMW M440\u003c\/p\u003e \u003cp\u003e2025+ BMW X3 G45 M50\u003c\/p\u003e \u003cp\u003e2025+ BMW X4 G46 M50\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eEmissions Disclaimer:\u003c\/strong\u003e\u003cbr\u003eThis product is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003enot legal for sale or use on pollution-controlled vehicles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoperated on public roads, highways, or streets. It is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eintended for off-road, race, or closed-course competition use only\u003c\/strong\u003e, where such modifications are permitted.\u003c\/p\u003e \u003cp\u003eBy purchasing this product, you acknowledge and agree that:\u003c\/p\u003e \u003cul class=\"ak-ul\"\u003e \u003cli\u003e You are\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eresponsible for compliance\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith all applicable emissions laws and regulations. \u003c\/li\u003e \u003cli\u003e MAD and its affiliates\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edisclaim any liability\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor improper or unlawful use of this product. \u003c\/li\u003e \u003cli\u003e Use of this part on public roads may violate the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eFederal Clean Air Act (42 U.S.C. § 7522)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand similar state laws. \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003ePlease check your local laws before purchase and installation.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":43077227741393,"sku":"MAD-127","price":407.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/1334\/6257\/files\/kies-motorsports-mastery-of-art-and-design-mad-bmw-b58-2025-gen-3-m340-m440-fat-boy-5-0-downpipe-catless-1232495493.jpg?v=1777325044","url":"https:\/\/speedfactorracing.com\/products\/mad-bmw-b58-2025-gen-3-m340-m440-fat-boy-5-0-downpipe-catless","provider":"Speed Factor","version":"1.0","type":"link"}