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      08-30-2011, 03:04 PM   #11
Drives: '09 M3
Join Date: Dec 2007
Location: SC

Posts: 594
iTrader: (1)

There should be no drone with this exhaust really at any rpm. Glad you found the reason for the problem. I thought the German dealers were super conscientious about their service work but I guess you can find some who are not so hot too.
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