The Supersprint X-Pipe will delete the set of resonators ahead of the rear mufflers. By removing the resonators, you can get more volume and growl from your exhaust as well as decrease exhaust restriction for slightly better power and torque. Deleting resonators makes a small but noticeable increase in overall volume and also changes the sound with a little more rasp and rip. This x-pipe fits in section 2 of the exhaust - after the factory secondary cat section and before the rear mufflers. It's also a full 70mm diameter - slightly larger than the stock piping. You will need to cut the original resonator section out of the exhaust and the Supersprint is clamped into place.

Alternatively, you may be interested in the Supersprint BMW E60 M5 Performance 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.