Quote:
Originally Posted by CajunBMW
Thanks for all the info. I certainly now understand exactly what they did to my car and what they are doing to the m340. I learned something. So is it correct that although the hardware for the F30 and G20 itself, although slightly different because of the differences in the car, is roughly the same in overall function. That is, the exhaust adds valves and provides better sound. In contrast, however, in the 340 mppsk there is an added tune that in general is included when you buy an m340. I realize there is a difference in HP, but similar torque between an 340 w/ mppsk and a m340 w/ mpe. Is that roughly correct? Thanks.
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I know we are getting off topic here (apologies OP).
In addition to the dual exhaust (well dual for some of the way) without resonators that has already been covered in this thread. There are some fairly meaningful mechanical updates with the B58TU engine (found in the M340) compared to the first gen (call it what you will) B58 in the 340. Here they are illustrated.
Hope this helps :-)