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      09-17-2012, 08:34 PM   #185

Drives: 2010 135i
Join Date: Mar 2010
Location: Nor Cal

Posts: 2,646
iTrader: (1)

Originally Posted by JStang View Post
Gotcha. So other than the factory tune, the n54 hardware is the same?
As far as I know, the N54is that is in the 1M and the 335is has an upgraded cooling fan, and the overboost function which allows for hitting 11psi in the mid range for a few seconds then tapers off

thanks to MGallop