Originally Posted by bavarian19
I will almost guarantee that it will void your drivetrain warranty. The 325 and 330 have different transmissions. The 325 tranny is not built to withstand the extra power the 330i has.
If a problem does arise, I could easily see how the dealership will point to your intake manifold...
that increase in power should not be too drastic to have to change trannys, bmw is really reserved in trannys, basically im sure the tranny could handle 40hp extra...and if not, lets go get a stickier clutch from uuc or somewhere else, the 330 clutch is just bigger in diameter, same material used....BMW's are mechanically very well off.