{"product_id":"b58-4-5-inch-catted-downpipe","title":"B58 4.5-Inch Catted Downpipe","description":"The MAD B58 4.5\" Catted Downpipe is an engineered exhaust solution for B58-powered BMW F and G chassis vehicles and the Toyota Supra. By replacing the restrictive stock downpipe, this unit optimizes exhaust gas velocity, resulting in increased horsepower, improved torque, and sharper throttle response. Its design includes 200 CEL high-flow catalytic converters that balance emission reduction with performance, paired with a dedicated flex section to endure high-heat conditions.\n\nManufactured from premium 304 stainless steel, the downpipe features smooth mandrel bends to maximize flow and eliminate drone.\n\nFitment covers a range of B58 applications, including the 2015+ BMW M240i \u0026amp; Xdrive, 2016-2019 BMW 340i \u0026amp; Xdrive, 2020+ BMW M340i \u0026amp; Xdrive, 2016+ BMW 440i \u0026amp; Xdrive, 2016+ BMW 540i \u0026amp; Xdrive, 2016+ BMW 740i \u0026amp; Xdrive, 2017-2020 X3 M40, 2017-2020 X4 M40, and 2019+ Toyota Supra 3.0L. Please note this product is for race use only.","brand":"MAD","offers":[{"title":"Default Title","offer_id":52662866936120,"sku":"MAD-3056","price":408.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687072358.webp?v=1784321632","url":"https:\/\/store.motormia.co\/products\/b58-4-5-inch-catted-downpipe","provider":"MOTORMIA","version":"1.0","type":"link"}