3.5" or 4.0" SS304 Stainless Steel Downpipe

The VRSF Racing Downpipe is engineered to be the best bang-for-your-buck modification for your BMW N55 engine, offering a substantial improvement in performance and sound. This direct bolt-on upgrade replaces the restrictive factory catalytic converter, significantly reducing exhaust back pressure. This reduction allows for faster turbo spool, leading to noticeable gains in horsepower and torque, as well as a more aggressive and desirable exhaust note. Constructed from handcrafted, tig-welded SS304 grade stainless steel, the downpipe features smooth radius bends designed to minimize turbulence and maximize flow. It utilizes a CNC SS304 stainless steel flange for a precise fit. The product comes with a VRSF Lifetime Warranty and a “No Hassle” satisfaction guarantee. This downpipe is available in two variants based on the year and wastegate type: 2011-2014 models (3.5" – PWG) and 2015-2018 models (4.0″ – EWG). It is compatible with a range of BMW models including the 535i, 535Xi, 640i, 640Xi, 740i, 740LiX, X5 35iX, and X6 35iX, with specific year ranges and wastegate type (Pneumatic or Electronic) noted for each application. Customers are advised to verify their turbo wastegate type to ensure proper fitment. Installation is described as a direct bolt-on application. However, to guarantee fitment, it is highly recommended that customers send a picture of their wastegate from the engine bay for verification. The downpipe is designed to work with a tune to achieve its maximum potential gains of 25-30hp.