{"product_id":"b58-catted-downpipe-1","title":"B58 Catted Downpipe","description":"The Active Autowerke B58 Signature Catted Downpipe is engineered to unlock the performance potential of the BMW B58 engine by replacing the restrictive OEM downpipe. Constructed from durable TIG-welded 304 stainless steel with a 1.5MM wall thickness, this downpipe utilizes 4.5-inch diameter piping to minimize exhaust back pressure and promote quicker turbo spool. It integrates an Active Aflow catalytic converter, which is EPA registered, OBD2 compliant, and designed to prevent \"Check Engine Lights\" for cat efficiency, guaranteed by Active Autowerke for the first two years of ownership. This catalytic converter is rated for engines up to 800 horsepower and operates efficiently within 9 seconds of startup, while withstanding temperatures up to 1500°F.\n\nThe downpipe tapers to 3.5 inches with a stainless flex joint before meeting the OEM exhaust system at 80mm, ensuring it never drops below the stock diameter. The catalytic converter substrate is also 304 stainless steel and furnace brazed for durability. Active Autowerke guarantees no CEL for catalytic efficiency with this downpipe. It is EPA compliant for use on OBD2 vehicles (1996 and newer) except in California. This downpipe is made in Miami, Florida.","brand":"Active","offers":[{"title":"Default Title","offer_id":52686762148152,"sku":"B58CATDP","price":1199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660178899.webp?v=1784876435","url":"https:\/\/store.motormia.co\/products\/b58-catted-downpipe-1","provider":"MOTORMIA","version":"1.0","type":"link"}