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      03-22-2012, 11:52 PM   #18
m 135
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Australia
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Drives: Gtr,135i,M235i,XR6 turbo
Join Date: May 2009
Location: Perth,Australia.

iTrader: (1)

I know the air-filters are placed at the rear on the 50i,which also makes them hard to change,where as the M versions are toward the front,making it easy to get to if you want after market filters.

I wonder if the different location on the 50i is a negative for air-flow like you mentioned