前管 kit + 消音器
(替换催化转化器)

Front pipes with resonators / silencers for M3 E9x.

These components replace the OEM front catalytic converters.
The integrated silencers (or resonators) have been designed to make the sound more refined and comfortable without any performance reduction compared to the front "straight" pipes.

The removal of the stock cats will result in the Check Engine Light turning on, this issue can be addresse through ECU remap or with the correct type of sensor cheaters / emulators / microcats. More info on request.