{"product_id":"b58-gen3-m240-m340-m440-downpipe","title":"BMW B58 2025+ Gen 3 M340 M440 4.5\" Downpipe Catless","description":"\u003cp data-pm-slice=\"1 1 []\" data-rte-preserve-empty=\"true\"\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\n\u003cp data-rte-preserve-empty=\"true\"\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\n\u003cp data-rte-preserve-empty=\"true\"\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\n\u003cp data-rte-preserve-empty=\"true\"\u003eFeatures:\u003c\/p\u003e\n\u003cul data-rte-list=\"true\"\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eHigh-grade 304 stainless steel for unmatched quality and durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e4.5-inch piping diameter for improved exhaust flow and performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eSignificant boost in horsepower and torque\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eEnhanced throttle response and reduced turbo lag\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eAggressive, deep, and sporty exhaust tone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eEasy direct bolt-on installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eUpgrade to MAD quality—experience superior performance, unmatched reliability, and thrilling sound for your 2025+ BMW M340 \u0026amp; M440.\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e \u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eFitment:\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e2025+ BMW M340\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e2025+ BMW M440\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e2025+ BMW X3 G45 M50\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e2025+ BMW X4 G46 M50\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e \u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003e\u003cstrong\u003eEmissions Disclaimer:\u003c\/strong\u003e\u003cbr\u003eThis product is \u003cstrong\u003enot legal for sale or use on pollution-controlled vehicles\u003c\/strong\u003e operated on public roads, highways, or streets. It is \u003cstrong\u003eintended for off-road, race, or closed-course competition use only\u003c\/strong\u003e, where such modifications are permitted.\u003c\/p\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eBy purchasing this product, you acknowledge and agree that:\u003c\/p\u003e\n\u003cul data-rte-list=\"true\"\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eYou are \u003cstrong\u003eresponsible for compliance\u003c\/strong\u003e with all applicable emissions laws and regulations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eMAD and its affiliates \u003cstrong\u003edisclaim any liability\u003c\/strong\u003e for improper or unlawful use of this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003eUse of this part on public roads may violate the \u003cstrong\u003eFederal Clean Air Act (42 U.S.C. § 7522)\u003c\/strong\u003e and similar state laws.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-rte-preserve-empty=\"true\"\u003ePlease check your local laws before purchase and installation.\u003c\/p\u003e","brand":"BOOTMOD3 TUNING USA","offers":[{"title":"Default Title","offer_id":45546111762605,"sku":"mad-126","price":259.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9299\/4989\/files\/image_2025-12-10_165655669.webp?v=1767651002","url":"https:\/\/bootmod3tuning.com\/products\/b58-gen3-m240-m340-m440-downpipe","provider":"BOOTMOD3 TUNING USA","version":"1.0","type":"link"}