[Alex_bm]

Hi Guys,

I have recently purchased an M3 and wanted to get a better sound of the car.
Got the rear Dinan exhaust installed at the dealer.
Now the exahust is not horribly loud, but there is some sort of booming sensation around 3000 rpm.

From my research Dinan rear section was supposed to fairly mild.
Any ideas if the booming is normal, should it go away after some time or there is some-thing wrong with the exhaust or installation?

Thanks in advance and please no jokes about the noise