Originally Posted by UdubBadger
yes but see the kit from Turner is only an upgrade for the 325... not the 328.
development is always slow on this stuff but active autowerks has a test car right now and are fitting a supercharger to it so that MIGHT be the 1st one to come out. I think they are trying with a 330i but it would FIT on a 328, all you would need is a reflash to run it which i know is made somewhere (forgot where I saw it though).
It'll be expensive... trust me i know, but honestly 255hp isn't much over the 230 in a 328i. by adding that ecu reflash, an intake, short throw shifter kit and some headers/exhaust and you'd probably be close enough to the performance numbers of a 330i (in acceleration and speed, maybe not HP) that you couldn't tell the difference between the 2. if you want some zip to the 3 u have 2 options: buy a 335 or supercharge a 330 or 328.
I am sure that Turner would have no issue making the conversion work on a 328i. They just need to use the software from a Z4 3.0si or an X3 3.0si as a baseline. The 3.0si engines are both N52N engines just like that of the 328i.