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      06-23-2008, 06:20 PM   #14
Robert
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Drives: 135i -> is350 -> Tesla M3 perf
Join Date: Aug 2005
Location: Socal

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I had my shop redo the mirror twice. Because VentureShield is a two piece design, if the gap is too narrow this creates a weird wind tunnel at the right frequency (harmonics) , and you hear the whistling. Have the shop to increase the gap a little bit and whistle goes away. My driver side is completely gone but there's still some coming from the passenger.
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