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      08-30-2011, 07:36 AM   #6
gthal's Avatar
Drives: C63 coupe
Join Date: Jul 2007
Location: Canada

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2011 M3  [3.37]
Don't drive at 2,000 RPM The only time the M3 sees that number is as it passes it. I think what you are hearing is normal, expected and not dissimilar to the non-performance exhaust.
gthal is offline   Canada
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