The VRSF N55 High Flow Catted Downpipe optimises exhaust flow by replacing the highly-restrictive factory catalytic converter, and also adds to the aural experience. This is one of the best upgrades you can make to allow the N55 engine to truly perform in your F2X M135i/M235i or F3X 335i/435i, as well as F87 M2. Please note that either BM3 or a custom map to suit will be required to correct fuelling and avoid EML light.

These pipes bolt directly to the OEM system and use factory mounting locations. Choose between 3.5″ PWG (pneumatic wastegate, pre-07/13) and 4″ EWG (electronic wastegate, 08/13 onwards) in the options. We have an catless version also available.

• Made from hand-crafted, TIG-welded 4.5″ 304-grade stainless steel
• 200-cell sports cat for optimised flow
• Fits LHD and RHD models with no other modifications needed
• Smooth radius bends to decrease turbulence and increase flow
• Direct fit with the stock exhaust as well as aftermarket systems