Custom 3" exhaust
Finally got around to taking a couple of pictures (albeit crappy ones) of the 3" exhaust on the race car. It's Supersprint headers to a Burns 3" merge collector to a Magnaflow 4" x 9" x 14" muffler capped off with a Borla 15" x 5" round muffler terminating before the diff. I have a turn-down that should probably go on there as well. I used two old rubber E46 transmission mount rubbers to mount the exhaust to the rearmost tunnel reinforcement plate. The whole thing is very light - it's mostly 18 gauge stainless tubing.
Sound is pretty excellent - no rasp to speak of as the perforated glass-pack type mufflers kill high frequencies very effectively. I don't drive the car on the street so I don't care too much about how it sounds but it just can't be too loud. Having said that, it's more than quiet enough for me to use on the street, if it terminated at the bumper.
'03 330i ZHP - Stock-ish
'02 330Ci - Megasquirted, E85'd and tuned by PFTuning.com