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      07-29-2019, 03:37 PM   #34
CP 1///M
Private First Class
Canada
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Drives: BSM 1M
Join Date: Aug 2014
Location: Vancouver, BC

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Not sure how much difference there is mounting a N55 vs N54 into a 1 series, but I think there were enough problems with the N54 to transition it out. 135i stock cars almost always overheat in Track days/HPDE... getting the S55 into the 2 series was a brilliant move though as the M3/M4 were just getting too big

I keep reading that the 1M were produced using the spare manufacturing capacity and in 2012, the 1 series switched to N55 in a planned move (which in my mind, more a cost cutting more than just reliability). If you think of it with the perspective of an unplanned execution, it makes more sense that they only made them for 1 year
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