Quote:
Originally Posted by eray
the differences between 118i @170 hp and other variants of that engine are
-Heat exchanger (balances oil temp)
-Exhaust diameter (2.5" on 170-177hp versions , 2.0" on rest)
-ECU map
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Recently, I have also heard that different materials/alloys are used for the internals of the engine, like the piston, etc...
Does anyone know how different they are?