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      01-31-2011, 06:14 PM   #12
Drives: "09 335i
Join Date: Jan 2010
Location: southwest??

Posts: 65
iTrader: (2)

Is the sound still there when you rev it up a little, does it change at all (pitch) or remain constant? From the title of the thread it sounds like it's not RPM dependent which would rule out anything mechanical inside the turbo, sans wastegate.
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