The S58 4.5" Single Midpipe upgrade is designed to unleash the incredible exhaust sounds from your G8X M3/M4. By removing the secondary catalysts and two middle resonators, the S58 Single Midpipe substantially improves the sound of your S58-powered BMW. Also, by retaining the OEM muffler, you still have the ability to control the exhaust valves, allowing you to close them for a more subtle tone for when you want to be quiet, or open the valves for maximum sound.

ENHANCE THE SOUND OF YOUR S58
The ARM S58 4.5" Single Midpipe will not only increase the overall volume of your exhaust but also transform the sound into something truly unique from an ordinary G80 M3. It will also make the exhaust burbles more audible even with OEM tuning. The G82 M4 in the video below is equipped with both the
S58 Single Midpipe and
S58 Downpipes. Pairing the S58 Single Midpipe with the
S58 Downpipes will increase the overall volume of your S58 even more than the S58 Single Midpipe alone.