{"title":"Category: Exhaust","description":"\u003cp\u003eShop BMW downpipes and exhaust hardware organized by engine and chassis fitment. BMD helps match the right setup for tuning and install goals.\u003c\/p\u003e","products":[{"product_id":"mad-bmw-s58-3-5-fat-boy-downpipes-m2-m3-m4-g87-g80-g82-g83","title":"MAD BMW S58 3.5\" Fat Boy Downpipes M2 M3 M4 G87 G80 G82 G83","description":"\u003cp\u003e\u003cstrong\u003eThe MAD 3.5\" S58 Fat boy is the largest BMW S58 catless downpipe on the market!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUpgrade from the stock S58 downpipes to the MAD 3.5\" Fat Boy  S58 catless downpipes for maximum airflow, power, and sound!\u003c\/p\u003e\n\u003cp\u003eUpgrade to the MAD BMW 3.5\" Fat Boy  S58 downpipes to eliminate the backpressure caused by your stock catalytic converters. By upgrading to our downpipes, your turbos can now spool faster and achieve maximum power. As a bonus, your car will sound a lot nicer as well.\u003c\/p\u003e\n\u003cp\u003eExpect up to a 30HP increase on a tuned BMW S58 with stock turbos, even more on cars with upgraded turbos.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe flex pipe Section will help reduce the stress and unwanted vibration from the downpipes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFeatures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLargest 3.5'' Diameter piping compared to standard 3''\u003c\/li\u003e\n\u003cli\u003eCompatible with right-hand drive and left-hand drive vehicles\u003c\/li\u003e\n\u003cli\u003eSmooth bends for maximum airflow without any drone\u003c\/li\u003e\n\u003cli\u003eUp to 30HP increase on the stock turbos, even more on upgraded turbos\u003c\/li\u003e\n\u003cli\u003eLifetime warranty on defects and fitment\u003c\/li\u003e\n\u003cli\u003eAll orders ship in 1-2 business days\u003c\/li\u003e\n\u003cli\u003eSpot on fitment\u003c\/li\u003e\n\u003cli\u003eFlex section\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFitment:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2021+ BMW M3 G80\u003c\/li\u003e\n\u003cli\u003e2021+ BMW M4 G82 G83\u003c\/li\u003e\n\u003cli\u003e2023+ BMW M2 G87\u003c\/li\u003e\n\u003cli\u003e \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSKU:\u003c\/p\u003e\n\u003cp\u003eMAD-047\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"paragraph\" data-prosemirror-node-block=\"true\" data-pm-slice=\"1 1 []\"\u003e\u003cstrong data-prosemirror-content-type=\"mark\" data-prosemirror-mark-name=\"strong\"\u003eEmissions Disclaimer:\u003c\/strong\u003e\u003cbr data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"hardBreak\" data-prosemirror-node-inline=\"true\"\u003eThis product is\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-prosemirror-content-type=\"mark\" data-prosemirror-mark-name=\"strong\"\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 data-prosemirror-content-type=\"mark\" data-prosemirror-mark-name=\"strong\"\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-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"paragraph\" data-prosemirror-node-block=\"true\"\u003eBy purchasing this product, you acknowledge and agree that:\u003c\/p\u003e\n\u003cul class=\"ak-ul\" data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"bulletList\" data-prosemirror-node-block=\"true\"\u003e\n\u003cli data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"listItem\" data-prosemirror-node-block=\"true\"\u003e\n\u003cp data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"paragraph\" data-prosemirror-node-block=\"true\"\u003eYou are\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-prosemirror-content-type=\"mark\" data-prosemirror-mark-name=\"strong\"\u003eresponsible for compliance\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith all applicable emissions laws and regulations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"listItem\" data-prosemirror-node-block=\"true\"\u003e\n\u003cp data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"paragraph\" data-prosemirror-node-block=\"true\"\u003eMAD and its affiliates\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-prosemirror-content-type=\"mark\" data-prosemirror-mark-name=\"strong\"\u003edisclaim any liability\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor improper or unlawful use of this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"listItem\" data-prosemirror-node-block=\"true\"\u003e\n\u003cp data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"paragraph\" data-prosemirror-node-block=\"true\"\u003eUse of this part on public roads may violate the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-prosemirror-content-type=\"mark\" data-prosemirror-mark-name=\"strong\"\u003eFederal Clean Air Act (42 U.S.C. § 7522)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand similar state laws.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-prosemirror-content-type=\"node\" data-prosemirror-node-name=\"paragraph\" data-prosemirror-node-block=\"true\"\u003ePlease check your local laws before purchase and installation.\u003c\/p\u003e","brand":"MAD","offers":[{"title":"Default Title","offer_id":45808631578821,"sku":null,"price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/PhotoRoom_001_20240405_123431__45281.jpg?v=1770935832"},{"product_id":"mad-b58-v2-catless-downpipe","title":"MAD B58 V2 4.5\" Catless Downpipe w\/ Bracket","description":"Upgrade your BMW B58 engine with this high-quality 4.5-inch catless downpipe made from 304 stainless steel. It eliminates the restrictive catalytic converter for maximum exhaust flow and improved turbo spool, delivering up to 30 HP increase and a more aggressive exhaust note. The downpipe features smooth bends, a flex section for durability, and a direct bolt-on installation that fits BMW M240i, M340i, 440i, 540i, 740i, X3 M40, X4 M40, X5 40i, X7 40i, Z4 M40i and Toyota Supra models","brand":"MAD","offers":[{"title":"Default","offer_id":45809462378693,"sku":"MAD-007","price":169.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/MAD-2007_1__54345.1706204001.386.513.jpg?v=1770945261"},{"product_id":"mad-b58-catted-downpipe","title":"MAD B58 4.5\" Catted Downpipe w\/ Bracket","description":"This 4.5-inch catted downpipe for the BMW B58 engine uses premium 304 stainless steel and a high‑flow catalytic converter to improve exhaust flow while maintaining emissions control. It delivers noticeable horsepower and torque gains, retains OEM fitment with smooth bends and a flex section, and installs as a direct bolt-on. Compatible with left‑hand and right‑hand drive vehicles, it fits BMW M240i, 340i, 440i, 540i, 740i, X3\/X4 M40, X5 40i, X7 40i, Z4 M40i and Toyota Supra","brand":"MAD","offers":[{"title":"Default","offer_id":45809462509765,"sku":"MAD-056","price":369.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/PhotoRoom_000_20240111_114207__80787.1705008486.386.513.jpg?v=1770945273"},{"product_id":"mad-b58-5inch-catted-downpipe-no-cel","title":"MAD B58 5\" Catted Downpipe w\/ No CEL Guarantee","description":"Crafted from premium 304 stainless steel, this 5-inch downpipe features a 300‑cell high‑flow catalytic converter and smooth piping that maximizes exhaust flow while ensuring there is no check engine light. It provides deeper exhaust tone, improved power and torque, and comes with a two‑year no‑CEL guarantee. It’s a direct bolt-on fitment for BMW M240i, 340i, 540i, 740i, X3\/X4 M40, X5 40i, X7 40i, Z4 M40i and Toyota Supra","brand":"MAD","offers":[{"title":"Default","offer_id":45809462739141,"sku":"MAD-120","price":949.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/WhatsApp_Image_2025-07-29_at_10.19.04_14df2edd__82456.1753979896.386.513.jpg?v=1770945283"},{"product_id":"mad-b58-fat-boy-5inch-catless-downpipe","title":"MAD B58 Fat Boy 5\" Catless Downpipe","description":"The Fat Boy downpipe is an oversized 5-inch catless system that delivers unrestricted exhaust flow, reducing backpressure and unleashing noticeable horsepower and torque gains. Made from high‑quality stainless steel with smooth bends and a flex section, it provides a direct bolt-on fit for BMW M240i, 340i, 540i, 740i, X3\/X4 M40, X5 40i, X7 40i, Z4 M40i and Toyota Supra","brand":"MAD","offers":[{"title":"Default","offer_id":45809462771909,"sku":"MAD-052","price":319.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/MAD-2052_1__58369.1706204263.386.513.jpg?v=1770945293"},{"product_id":"mad-b58-gen3-4-5inch-catless-downpipe","title":"MAD B58 Gen 3 4.5\" Catless Downpipe (2025+ M340\/M440)","description":"Designed for the 2025+ B58 Gen‑3 engines, this 4.5-inch catless downpipe uses premium 304 stainless steel to eliminate the restrictive factory catalyst. It significantly improves exhaust flow, throttle response and turbo spool while adding an aggressive exhaust note. It fits 2025+ BMW M340 and M440, and upcoming X3 G45 M50 and X4 G46 M50 models","brand":"MAD","offers":[{"title":"Default","offer_id":45809462935749,"sku":"MAD-126","price":259.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/WhatsApp_Image_2025-05-16_at_11.04.02_c680f6c2__42110.1749140002.386.513.jpg?v=1770945303"},{"product_id":"mad-b58-gen3-fat-boy-5inch-catless-downpipe","title":"MAD B58 Gen 3 Fat Boy 5\" Catless Downpipe (2025+)","description":"This Gen‑3 Fat Boy downpipe features a massive 5‑inch diameter for improved exhaust gas velocity and a deeper, more aggressive exhaust tone. Made from premium 304 stainless steel, it is a direct bolt-on upgrade that delivers increased horsepower and torque and fits 2025+ BMW M340\/M440 and the forthcoming X3 G45 and X4 G46 models","brand":"MAD","offers":[{"title":"Default","offer_id":45809463001285,"sku":"MAD-127","price":279.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/WhatsApp_Image_2025-05-16_at_11.07.45_0a98b8c7__58904.1749140231.386.513.jpg?v=1770945313"},{"product_id":"mad-b58-gen3-5inch-200-cell-catted-downpipe","title":"MAD B58 Gen 3 5\" 200-Cell Catted Downpipe (2025+)","description":"For the 2025+ B58 Gen‑3 engines, this 5-inch downpipe includes a 200‑cell high‑flow catalytic converter that refines the exhaust tone while enhancing power. Constructed from 304 stainless steel with smooth 5-inch piping, it offers a deeper, more controlled sound and significant horsepower and torque gains while ensuring emissions compliance. It fits 2025+ BMW M340\/M440, X3 G45 M50 and X4 G46 M50 models","brand":"MAD","offers":[{"title":"Default","offer_id":45809463066821,"sku":"MAD-128","price":369.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/WhatsApp_Image_2025-05-16_at_11.10.08_d6cf4dd5__74847.1749140419.386.513.jpg?v=1770945324"},{"product_id":"mad-s58-catless-downpipes","title":"MAD S58 Catless Downpipes","description":"These catless downpipes for the BMW S58 engine maximize exhaust flow by eliminating backpressure, leading to quicker turbo spool, increased horsepower and a more pronounced exhaust sound. Made from high‑quality 304 stainless steel with smooth bends and a flex section, they bolt on directly to BMW M3 G80\/G81, M4 G82\/G83 and M2 G87 models","brand":"MAD","offers":[{"title":"Default","offer_id":45809463754949,"sku":"MAD-032","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/WhatsApp_Image_2025-03-19_at_11.03.56_AM__46253.1766606427.386.513.jpg?v=1770945396"},{"product_id":"mad-s58-fat-boy-3-5inch-catless-downpipes","title":"MAD S58 Fat Boy 3.5\" Catless Downpipes","description":"With a large 3.5-inch diameter, these Fat Boy catless downpipes free up exhaust flow and lower backpressure, generating a throatier exhaust note and up to 30 HP on a tuned S58 engine. They are built from premium stainless steel with smooth bends and a flex section and fit the 2021+ BMW M3 G80\/G81, M4 G82\/G83 and 2023+ M2 G87","brand":"MAD","offers":[{"title":"Default","offer_id":45809463787717,"sku":"MAD-047","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/PhotoRoom_001_20240405_123431__45281.1712353069.386.513.jpg?v=1770945401"},{"product_id":"mad-s58-resonated-downpipes","title":"MAD S58 Resonated Downpipes","description":"These resonated downpipes strike a balance between performance and refinement, reducing exhaust rasp while still improving throttle response and turbo spool. Constructed from high‑grade 304 stainless steel with a flex section, they bolt directly onto BMW M3 G80\/G81, M4 G82\/G83 and M2 G87 models","brand":"MAD","offers":[{"title":"Default","offer_id":45809463820485,"sku":"MAD-075","price":439.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/2075-3__62245.1696866672.386.513.jpg?v=1770945408"},{"product_id":"mad-s58-catted-downpipes","title":"MAD S58 Catted Downpipes","description":"Featuring high‑flow catalytic converters and premium 304 stainless construction, these S58 downpipes increase horsepower and torque while remaining emissions compliant. They utilize smooth, mandrel‑bent piping for maximum flow and bolt directly to the factory exhaust without cutting or welding","brand":"MAD","offers":[{"title":"Default","offer_id":45809463853253,"sku":"MAD-051","price":569.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/Photoroom_001_20250313_143044__66981.1742408256.386.513.jpg?v=1770945414"},{"product_id":"mad-s58-catted-downpipes-no-cel-1","title":"MAD S58 Catted Downpipes w\/ No CEL Guarantee","description":"These premium downpipes feature 300‑cell high‑flow catalytic converters that improve power and sound while preventing check‑engine lights. Made from 304 stainless steel, they bolt directly to the stock exhaust system and are designed for BMW M3 G80\/G81, M4 G82\/G83 and M2 G87","brand":"MAD","offers":[{"title":"Default","offer_id":45809467228357,"sku":"MAD-121","price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/9841\/1461\/files\/WhatsApp_Image_2025-07-29_at_10.19.19_81cfd151__59452.1753981046.386.513.jpg?v=1770945675"}],"url":"https:\/\/bmdperformance.com\/collections\/category-exhaust.oembed","provider":"My Store","version":"1.0","type":"link"}