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Old 12-13-2008, 11:26 PM   #2
CyFi6
3" Exhaust
 
Join Date: Oct 2007
Location: SLO
Posts: 234
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do you hear it at idle? Does it sound more like a double knock or is the speed of it consistent? You could also have valve noise. Theres really a lot of things that can make knocking noise including a cracked flexplate etc..
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