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Old 10-06-2010, 07:40 PM   #13 (permalink)
mh0187
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Join Date: Feb 2010
Location: FL
Posts: 7
Drives: 370z
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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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