Quote:
Originally Posted by PrematureApex
BMW has never used "twinpower" to describe the N54.
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"While its N54 predecessor uses parallel twin-turbochargers, the N55 uses a single twin scroll turbocharger.[6][7] BMW has used the term "TwinPower Turbo" to describe both twin-turbo and (single turbocharger) twin-scroll systems."
http://en.wikipedia.org/wiki/BMW_N55
I presume that a guy that works for AC Schnitzer knows all the details too, I personally don't find it very important.