BMW M3/M4 (F80, F82, F83) Post Cat Spare Pipes with Muffler Steering and Suspension At lower engine speeds and

At lower engine speeds and during cruise operation the valves are closed and produce a deeper exhaust note

multi-gauge layouts

Cat-back and Axle-back options available

Note - The 2008+ WRX/STI do not need to have the test connectors connected as stated in the instruction booklet to install the AccessPORT

BMW M3/M4 (F80, F82, F83) Post Cat Spare Pipes with Muffler Steering and Suspension At lower engine speeds andBMW M3 M4 (F80, F82, F83) Post Cat Spare Pipes with Muffler The silencing effect of the OEM Spare Pipes and Resonator are reduced while maintaining a higher flow muffler and enhancing the car's naturally aggressive engine sound. Made from T309 (1. 4828) stainless steel.