{"product_id":"b58-catless-downpipe","title":"B58 Catless Downpipe","description":"The Active Autowerke 11-061 Catless Downpipe is engineered to unlock the performance potential of BMW's valvetronic, single-turbo B58 direct-injection engine, specifically for later F-Chassis models starting from 2016, including the M240i, 340i, and 440i.\n\nThis downpipe features a robust construction utilizing TIG-welded 304 stainless steel with a substantial 1.5MM wall thickness for extreme durability. Its primary design element is the 4.5-inch diameter piping, which significantly reduces exhaust back pressure, allowing spent exhaust gases to evacuate more quickly. This improved flow directly translates to faster turbo spool, leading to enhanced horsepower and torque delivery. The piping tapers to 3.5 inches, incorporating a stainless flex joint before meeting the OEM exhaust system at 80mm, ensuring it never reduces to a diameter smaller than the stock 80mm.\n\nThe downpipe also includes a cast upper V-Band for precise fitment and is proudly made in Miami, Florida. Owners will require an Active Autowerke software upgrade to prevent a Check Engine Light (CEL) when using this downpipe for off-road purposes.","brand":"Active Autowerke","offers":[{"title":"Default Title","offer_id":52686763786552,"sku":"11-061","price":379.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660671558.jpg?v=1784876457","url":"https:\/\/store.motormia.co\/products\/b58-catless-downpipe","provider":"MOTORMIA","version":"1.0","type":"link"}