My break in mileage was 1500 km and I am past that already. Went to dealer to do the first scheduled maintenance. Zero difference. Still very mute sound in any mode. When I switch it to race mode I get more sound through the speakers, rather than from exhaust (WTF?)

Think you guys should start stating where you guys are located. I have the facelift and not having these sort of muted exhaust issues. If you saw rokens videos, UAE for example has no such limitations on their exhaust noise. Think for the most part it's Europe/uk/USA that are seeing such limitations. Feel sorry for you guys

yes several people have. and yes it does improve sound.

Is the performance exhaust standard in all C63, S and non S?
could that be the difference?