Think about it this way... When someone walks up to you an says "woah man, that's a sweet setup, what exhaust are you running on that 335?" and you reply with "it's stock, I just liked the look of the quad tips." how are you going to feel?
I know that I would feel a bit like a wannabe. I actually like the look of quads on our cars, but it does nothing for the car and can't justify it because of that... I think on our cars, the exhaust is best left untouched... DPs are another story :-)
Jet black e92 6mt 335xi:
18" BBS RGRs, KW v1, ESS Stage 2 flash, VRSF 7" FMIC, VRSF downpipes, JG Mods m-tech front, mtec V3 AEs, BMS OCC, hardwired valentine 1, p3cars gauge, amber delete, sport seats, factory oil cooler.