Thread: Who makes the best HFC's without rasp?
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Old 02-07-2010, 10:55 PM   #4 (permalink)
SophiaZ
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Really?!! I just thought it was from loss of back pressure cuz when I put on my S-Tune exhaust, it sounded fine until I put on the Stillen HFC's. I can even hear it when I'm upshifting , not downshifting
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