Quote:
Originally Posted by bulldog x6
it will be noticably slower but not as much as if you came from an n54 powered E9X
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When both are tuned, N54 makes considerably more power than the N55. N55 is slightly better on fuel economy and is cheaper to manufacture. With ONLY a JB4 tune and DCI (costing me a grand total of $600), I'm at over 400 rwhp when I run a 60/40 premium/e85 mix.