You need the right R+P, not just any E46 R+P
Originally Posted by Hornung418
So I can take the ring and pinion from a 3.15 open diff and swap it to the M3 rear and it will reinstall it with perfect fit?
And it's not as easy as just swapping over. Lots of work to swap them.
'02 330Ci - Megasquirt 3 tuned by PFTuning.com, M50 manifold, Kromer Kraft headers, Motons, widebody, etc.