I This past weekend I been driving with a couple of friends (Mercedes 320 and Saturn Sky) I tell you the way the Mercedes sound is very nice but my car is too quiet .Do you guys know what type of any particular exhaust system I can get to improve the performance and the give it a sport sound to the car? I us to own the Z4 3.0 and I loved the way it sound of course the Z4 3.5 has a sound tunnel to give the sport sound but now I have the power but not the sport sound.