I know this has been asked a thousand times, but I can't find the specific answer, so here goes again.

I have some 8.5 inch 10-spoke E36 M3 wheels (yes, non-staggered set-up) left over from that car that I used for autocrossing. Will these fit on my E46 M3? Do I need spacers?

17" wheels fit. You'll want spacers in the rear.