4.10 or 4.40 gears are off the top for E46 M3 application. Stick with the 3.91 upgrade as it is far for driveable...bobm3 said:they would tell you. and by the way they have 440 gears for the m3. i was going to call this week but got bussy at work and forgot to call. let me know what they say please.
bobm3 :thumbup: :thumbup:
bogie said:My 3.91 diff works perfectly with my SMG M3. It is by far the best mod. I have had it on for ~5 months now.
P.S. What are your redlines with the Eurobahn software?
Are yours all different also?