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for my catback exhaust I was looking at highflo cats. will these make a difference? and as at as aftermarket header. will an aftermarket make any difference compared to stock?
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Base Member
Join Date: Jan 2012
Location: Pennsylvania
Posts: 25
Drives: 10 Nissan 370z CB M6
Rep Power: 15 ![]() |
for my catback exhaust I was looking at highflo cats. will these make a difference? and as at as aftermarket header. will an aftermarket make any difference compared to stock? heard they will and heard they wont.
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