Originally Posted by RichP
People here are talking about forced induction, and you guys are worried about tranny stress? Not nearly enough to make a difference.
Im curious if the 328 is either :
a tuned up 325 (single stage manifold) or
a tuned down 330 (3 stage manifold)
This is still for sale. If you have a 325, and really want some more power, this the only way to fly. ECU is about 900, so you are talking $1500 total, which is pretty cheap for BMW horsepower.
I believe the 328 is a detuned version of the X3 si. Also, tranny stress wouldn't be a factor with the Steptronic. I'm guessing that BMW is probably a bit brighter than to allow a 330i intake manifold + random 330i ECU to magically work on any given 325i. It would be sweet though...