B58 4.5" SS304 Stainless Steel Downpipe

The VRSF B58 Downpipe Upgrade (MPN 10582010) is engineered to enhance the performance and sound of your BMW's B58 engine. By replacing the restrictive factory catalytic converter, this downpipe significantly reduces back pressure, leading to a faster turbo spool, increased power output, and a more aggressive exhaust note. It is available in two configurations: a Track Limited Racing Downpipe and a High Flow Catted Downpipe featuring a 200-cell high-flow cat. Crafted from SS304 grade stainless steel with a 4.5-inch diameter, the downpipe utilizes a CNC-machined 304-grade stainless steel flange for a smooth transition from the turbocharger to the mid-pipes. The construction involves hand-welding and tig-welding techniques to ensure durability and optimal flow. Smooth radius bends are incorporated to minimize turbulence and maximize exhaust gas velocity. This VRSF downpipe is compatible with a range of BMW models equipped with the B58 engine. Specific fitment includes: - 2016-2022 F22/F23 BMW M240i & M240i xDrive - 2016-2022 F30/F31 BMW 340i & 340i xDrive - 2016-2022 F32/F33/F36 BMW 440i & 440i xDrive - 2016-2022 G30 BMW 540i & 540i xDrive - 2016-2022 G32 GT BMW 640i & 640i xDrive - 2016-2022 G11/G12 BMW 740i & 740i xDrive - 2018-2022 G14/G15 BMW 840i & 840i xDrive The product comes with various surface finish options, including Heat Shield, Brushed Finish, and Cerakote High Temp Coating. The VRSF downpipe carries a lifetime warranty for the race versions and a one-year warranty for the high-flow catted version. Gains of 25-30hp are noted with a tune.