FabSpeed BMW 335/135i Cat Bypass Downpipes



Straight-through tubing section replaces the heavy and restrictive OEM catalytic converters for maximum power and sound; recommended for track/off-road use only.                                                                         


  • Fits all BMW 335/135i vehicles (2006-2011)

  • Improves power by 32 whp and 39 ft-lbs of torque


  • Straight-through design allows for maximum power and sound

  • Constructed from mirror-polished T304L stainless steel

  • Direct bolt-on replacement for OEM primary catalytic converters

  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty


DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. We suggest pairing this product with racing software to prevent fault codes and check engine lights. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.