{"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":"\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=\"313\" data-start=\"0\"\u003eEnhance your BMW's performance with the MAD BMW B58 Gen 3 Catless Downpipe, specifically engineered for the 2025+ BMW M340 \u0026amp; M440. Crafted from premium 304 stainless steel, this 4.5-inch downpipe guarantees optimal exhaust flow, durability, and resistance to corrosion, providing the absolute best quality and longevity.\u003c\/p\u003e \u003cp data-end=\"646\" data-start=\"315\"\u003eBy eliminating restrictive factory catalytic converters, the MAD catless downpipe significantly boosts horsepower, sharpens throttle response, and reduces turbo lag, delivering an exhilarating driving experience. Precision-engineered welds and exact fitment ensure a seamless, bolt-on installation without hassles or modifications.\u003c\/p\u003e \u003cp data-end=\"870\" data-start=\"648\"\u003eEnjoy an aggressive, sporty exhaust note and unparalleled performance gains. The MAD downpipe is a must-have upgrade for both daily-driven enthusiasts and track-focused drivers seeking to unlock their BMW’s full potential.\u003c\/p\u003e \u003cp data-end=\"881\" data-start=\"872\"\u003eFeatures:\u003c\/p\u003e \u003cul data-end=\"1196\" data-start=\"883\"\u003e \u003cli data-end=\"952\" data-start=\"883\"\u003e High-grade 304 stainless steel for unmatched quality and durability \u003c\/li\u003e \u003cli data-end=\"1021\" data-start=\"953\"\u003e 4.5-inch piping diameter for improved exhaust flow and performance \u003c\/li\u003e \u003cli data-end=\"1066\" data-start=\"1022\"\u003e Significant boost in horsepower and torque \u003c\/li\u003e \u003cli data-end=\"1117\" data-start=\"1067\"\u003e Enhanced throttle response and reduced turbo lag \u003c\/li\u003e \u003cli data-end=\"1161\" data-start=\"1118\"\u003e Aggressive, deep, and sporty exhaust tone \u003c\/li\u003e \u003cli data-end=\"1196\" data-start=\"1162\"\u003e Easy direct bolt-on installation \u003c\/li\u003e \u003c\/ul\u003e \u003cp data-end=\"1321\" data-is-last-node=\"\" data-is-only-node=\"\" data-start=\"1198\"\u003eUpgrade to MAD quality—experience superior performance, unmatched reliability, and thrilling sound for your 2025+ BMW M340 \u0026amp; M440.\u003c\/p\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":43077227774161,"sku":"MAD-126","price":378.99,"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-m440-4-5-downpipe-catless-1232495497.jpg?v=1777325046","url":"https:\/\/speedfactorracing.com\/products\/mad-bmw-b58-2025-gen-3-m340-m440-4-5-downpipe-catless","provider":"Speed Factor","version":"1.0","type":"link"}