Just thought I'd share. Recently installed the full Magnaflow TOURING series catback on my girls e90 335i. VERY little drone with deep tone. 6AT, jb4, bms dci, with stock down pipes. IMO best exhaust in terms of price per performance. You get sections 1 & 2 plus muffler for about $800. If you're looking for loud this isn't for you. But if you're looking for low deep tone, no rasp, and little drone then you might want to give it a try. Also the 4" tips fits nicely into the stock bumper cut out.
excuse my lazy helper. Maybe next time I'll remember to hand out the brews after the install.
A before and after