I would expect the n55 to have a little less low end grunt, but be surperior up top where it really helps for performance reasons.
a n54 powered vehicle can certainly pull my M3 on low end rpm pulls, but once i'm spooled, good bye.
same idea but the n55 wont be as laggy as a larger turbo for many reasons, twin scroll and valvetronic being 2 of the main ones.
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