Quote:
Originally Posted by CntryClub007
The specs say twin turbo charged 6? Surely this thing has the single turbo B58? The M40i doesn't have an S55 or N63TU in it, does it? That would be insane if it did. Maybe I missed something?
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Common confusion caused by BMW's TwinPower turbo trademark name. TwinPower can refer to a true twin-turbo setup (S55) or a twin-scroll single turbo (B58). The new Z4 uses the latter.