Quote:
Originally Posted by Wiles
You are miss informed!
All Z4 E89 3.5i and 3.5is have the True Twin Turbo N54, not just the 35is.
I think part of the confusing is BMW marketing speak "twinpower". This is the marketing name for both the Twin Turbo (N54) and Twin Scroll single Turbo (N55) motors.
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As for as i know the 3.5i has the N54 until may 2011, later it has the N55.
I speak for the production of Europe but that makes no difference. I think.
Sorry for my englisch.