I am thinking of swaping out my 2.93 diff for a 3.15, the E90 comes with one stock. I think it will bolt right up to my 04 330i 6MT because as far as I know E90 & E46 6MT are the exact same tranny. Anyone know if they're a direct swap? I want a 3.15 but I don't want to swap flanges or any of that B$.