Introducing IPE Innotech's Valvetronic C63AMG exhaust system
#31
#32
Member
Honestly i am probably tone deaf but when valves are closed the system sounds almost similar if no quieter than stock. no bull! But when they are open and the revs are up its a different story.... your brains rumble in shock too. LOL
#40
Senior Member
do u have a video by any chance?