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      01-27-2013, 07:22 PM   #3
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Drives: F13 M6 Alpine/Sakhir On Order
Join Date: Feb 2012
Location: Miami

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Sounds like it some areo thing that's doing that; I'd check to see if anything is hanging around the car or underneath it. For example if you had roof rails on your X6M it would sound like what you describe.
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