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      07-30-2011, 12:08 PM   #5
gthal's Avatar
Drives: C63 coupe
Join Date: Jul 2007
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2011 M3  [3.37]
I would think it HAS to be the rear because the speedometer moves on a dyno (if memory serves me) and it would do that unless the speed is measured from the rear.
gthal is offline   Canada
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