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      01-20-2012, 05:46 PM   #2
avex8
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Drives: 11 E92 M3, 13 X3 35i, 14 650i
Join Date: May 2011
Location: San Diego

iTrader: (3)

GT and GTM refer to the axle back. GT is the old version which has rasp and ring noise. GTM is the newest version which cleans out the ring noise.