BMW F-SERIES 12-13 135i 335i N55 Front PIPE E82 F30 Straight Catless Downpipe

Upgrade your BMW F30/E82 N55 motors with the Circuit Werks 3.5" V-band to 4" turbo. This high-performance pipe offers the ideal combination of pure, race-inspired power and in-cab comfort, while providing an exhilarating exhaust tone during both regular driving and aggressive acceleration. Direct bolt on installation uses OE-style bracket locations, and a factory O2 sensor location. This pipe is designed to work  with either stock or aftermarket turbos using the original 3.5" V-Band Clamps.  Fits 2012-2013 BMW 135i 335i N55 F30/E82 (NOTE: This is only compatible with models manufactured between 2012 and 7/2013).  All M135i & 335i models produced up to 07/13 require the 3.5″ version of this downpipe that we offer as well.                                                                                                         The 3.5" uses a Pneumatic Wastegate  M135 and 335i models produced after 07/13 require the 4″ model of this downpipe.                                           The 4" uses an Electronic Wastegate Crafted from top-quality Stainless Steel and T.I.G. welded, it is recommended to have this product professionally installed, although it can be a direct bolt-on.  This includes three O2 bungs with plugs, in case you choose not to use them. With a tune, you can expect a 20+HP gain.