Supersprint BMW E60 M5 Performance Resonated X-Pipe

These tuned resonators replace the factory resonator in section 2 of the exhaust. Supersprint also offers this section without any resonator at all. But if noise and volume is a strong consideration for you then using resonators is a good idea. If you were building a track car with headers and no cats then resonators will help keep noise levels low. This section is 309 stainless steel and 70mm diameter pipes (a little bigger than the factory size) so this piece will flow better and be a little louder than the factory resonator.

Alternatively, you may be interested in the Supersprint BMW E60 M5 Performance Non-resonated X-Pipe.

You may also be interested in the Supersprint BMW E60 M5 Performance Rear Exhaust Silencers and the Supersprint BMW E60 M5 Performance Sport Exhaust Manifold.