Originally Posted by MrRoboto
Just reading that Proceed is fully compatible with the 335is but there is no gain over the standard 335i.
Is the 1M and the 335is powerplant the same?
1M and 335is versions of the N54 are not the same. 1M appears to share the same engine as the Z4 35is. The version in the 335is is slightly lower on HP (320 vs 332).