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      01-16-2013, 04:55 PM   #19
First Lieutenant
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Drives: 2008 E90 M3
Join Date: Jan 2012
Location: Mill Creek, WA

Posts: 360
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I have the sound after installing the MS pulley as well, at full lock. I wonder if the single pulley design of the AA pulley exhibits this issue. It stands to reason that the smooth pulley/belt from MS isn't grabbing as well as a ribbed pulley/belt would.
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