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Old 12-02-2014, 06:16 PM   #473 (permalink)
avery370z
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Join Date: Mar 2014
Location: Fort Worth,Texas
Posts: 153
Drives: 2014 370z w/ Sp Pkg
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I dont think the exhaust is the hold up im running the most improper headers according to this forum(Stillen). And i have Z1 HFCs.337whp 267tq. not bad no idle issues and the throttle response is incredilble.
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