Alright, so most of you probably haven't seen this amazing chart by pencilgeek. (
Chart) This should help explain things.
On a dynojet, stock M3s have gotten from 324WHP all the way up to 350-360WHP. Unfortunately we did not have a chance to do a dyno the car stock so we do not know what the real gains are for all the mods thus far. But for the gains of the pulley we should get an accurate reading.
D