Quote:
Originally Posted by 1SerieStud
intake is different, and exhaust is different.
Sure, the core is an N54 engine, but anyone saying that his/her 135i N54 is identical, is in some major denial. Clearly the N54 going on the 1M was tweaked to better suit the task at hand, which is powering a car worthy of the letter ///M  |
Major denial?
The differences are minor at best (maybe except for the piston rings you mention...i don't know enough about that to even comment)....as far as the intake is concerned maybe the airbox is fluted different on the inside??? Even still any differences to the intake side are minimal....the exhaust being different is a push as there aren't any performance gains from it and it is a more a visual/audio difference more than anything....so the engine being nominally the same/identical is still a valid argument IMO. The engine was already tweaked and put on a vehicle before it went into the 1M...its called 335is
