X6 40d N57 tune
Guys I'm thinking Bout swapping out the 135i for an X6 40d. Can you tune those puppies and if so which one do you recommend?
New to all this N57 stuff, N55 is a dream to tune.
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2011 135i N55 | Black | M Sport | DCT | Sunroof | Pro Nav | Alpine Hi-Fi | Commbox | Tint | blah blah
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