{"product_id":"n55-3-5-inch-catted-downpipe","title":"N55 3.5-Inch Catted Downpipe","description":"The Active Autowerke N55 Signature Downpipe is engineered to relieve exhaust back pressure, leading to quicker turbo spool and increased horsepower and torque for compatible BMW N55 F-Chassis models. Constructed from TIG-welded 304 stainless steel with a 1.5MM wall thickness, this downpipe offers robust durability and a long lifespan. It features a 3.5-inch diameter pipe designed for maximum flow with minimal bends, fitting easily into the OEM location for a straightforward installation process that requires no cutting or welding.\n\nThis specific variant includes a 4.5-inch GESI G-Sport Ultra High Output (UHO) catalytic converter. The GESI converter is EPA registered and fully OBD2 compliant, designed to eliminate most \"Check Engine Lights\" related to catalytic efficiency. Its construction also includes a full 304 stainless steel substrate and utilizes proprietary precious metal loading technology for reduced emissions. The GESI UHO-Series converter is rated for 500 to 850 horsepower applications and can reach operational efficiency within 9 seconds of startup, while withstanding up to 1500°F.\n\nA key benefit of this downpipe is that NO PERFORMANCE TUNE IS NEEDED. The design aims to minimize back pressure while maintaining daily driveability. It is EPA compliant for use on OBD2 vehicles (1996 and newer) in 49 states. However, these catalytic converters are not legal for use on vehicles registered in California due to specific state regulations. Fitment is intended for US model cars only; non-US models are not guaranteed. The downpipe is covered by a 5-year\/50,000-mile warranty on the shell and tube ends, and a 2-year\/25,000-mile warranty on the catalytic core, though the warranty is voided by excessive burble.","brand":"Active","offers":[{"title":"Default Title","offer_id":52686763655480,"sku":"11-040A","price":1139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/661655057.webp?v=1784876454","url":"https:\/\/store.motormia.co\/products\/n55-3-5-inch-catted-downpipe","provider":"MOTORMIA","version":"1.0","type":"link"}