more engine growl
My old 2003 X5 4.4 had a great engine
growl with acceleration. Since I got the
PPK1, the exhaust tune is nice with
a little vibration in the back seat in
1st to 2nd or down shift.
I would like to hear a little more
growl from the front end. Air filter
drop ins have not changed anything.
Suggestions Yes I know the X was a
Current 2011 335i Coupe
Last edited by Noncom23; 06-15-2012 at 09:31 AM.