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Old 04-21-2012, 01:54 AM   #12
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Location: Soquel, CA
What I Drive: 2002 silver SVT Focus

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I have a 67mm throttle body & steeda SRI. I'm 99% sure the whistle just happens with this setup. Over time it has faded... even when I clean and oil my filter, it's still not as bad as when I first got the setup.
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