Active Autowerke Signature Exhaust System BMW 135 08-11

Active Autowerke Signature Exhaust System BMW 135 08+

Active Autowerke has released the newest addition to the Signature line of exhaust systems. After months of testing this system with 3” piping Active Autowerke;s engineering team decided that 3.5” piping is the most adequate size for a free flowing design. The increase in piping size decreases back pressure allowing the 135’s twin turbo to spool even faster resulting in increased horsepower and torque. The incorporation of the noise cancellation chamber on the side of the exhaust reduces/eliminates drone.