Focus Fanatics - View Single Post - whistle sound during acceleration
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Old 06-19-2013, 10:46 AM   #19
Focus Jr. Enthusiast
Join Date: Mar 2013
Fan#: 111415
Location: Dayton, OH
What I Drive: 2004,Pitch Black, SVT

Posts: 29
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Is it possible it isn't upgrade related? Like maybe something else is loose causing air to move through it?
SRI and bigger throttle bodies do tend to make more noise overall and you could just be hearing the difference between stock and not stock.
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