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Old 05-29-2012, 06:57 PM   #15
Bwill9886
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Quote:
Originally Posted by Joshuaneufeld1 View Post
My 2012 focus s I put a k&n filter on and left cover off, but it sound weird like I lost power or sounds like a boxer motor. Is it supost too?
Many others (including myself) have done the same and got similar results in other threads.

I'd put the cover back on if I were you, but as it's your car, do what you please. If you want more intake noise, get an aftermarket unit.
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