You're going to put a stock M3 suspension on a 323? Let us know how that works out for you... I'm guessing you're not going to be too happy with the results. But then again, other than the potential increase in ride height, it's probably not much worse than some of the cheap coilovers other members put on their cars.
04 IR 330i ZHP | ESS TS2+ SC | MagnaFlow "headers" | KMS 3.64 LSD | AST 4100 550/650| APEX ARC-8 18x9 | H&R front sway bar | Vorshlag camber plates, RTAB limiters | TMS subframe & swaybar reinforcements | UUC SSK & DSSR | UUC TM & TME | BW motor mounts | Dinan strut & shock tower bars | vaio 4-bolt oil pump