installed the other day. it sounds good when you mount it but i thought it was somewhat quiet. then i drove it a few days and wow. it got progressively louder each time i drove it for at least 3 days. now it sounds amazing when you start it and i love driving with the windows down as much as i can.
'07 335i E90 Montego Blue on black leather, Navi, premium, sirius, sport pkg, CA, logic7
'12 KTM RC8R White/Orange
Sold: '07 328i E92, SG, Saddle Brown, Gray Poplar, ZSP, CA, Heated Seats, BMW Performance Exhaust, BMW performance SSK, Valentine1, european delivery - Military Sales