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Old 06-21-2012, 02:40 PM   #6
Registered User
Join Date: Jan 2012
Location: Londonderry
Posts: 280
My Ride: 04 325xi
Could it be the fact I have a small hole in my air box?
I did the custom airbox mod thing, the edge cracked, and I was too lazy to seal it.

It just to me, sounds more of a metal whistle, than air.
mattfarrington is offline   Reply With Quote