Originally Posted by divisionbell77.
I have an SE version of the 335i that came out late last summer that has the same setup as the IS except for the DCT
If thats the case, then you have a N54 motor. My understanding is that only the IS still uses the N54 motor, so I doubt that you have the same thing as an IS without the DCT. More likely you have the N55 with a factory installed PPK and it does not have overboost. There is no factory overboost on the N55