10-19-2010, 07:05 PM
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#15 (permalink)
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Base Member
Join Date: Oct 2010
Location: inland empire
Posts: 29
Drives: mazdaspeed3
Rep Power: 15
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Quote:
Originally Posted by mh0187
I just changed my exhaust from an F.I. with 12" resonators to the HKS and I noticed significant low and mid-range improvement with the butt dyno over the F.I.
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um...lol 
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