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nmanfredi43 · 02-14-2012, 05:06 PM

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.

thank you

02-14-2012, 05:06 PM	#1 (permalink)
nmanfredi43 Base Member Join Date: Jan 2012 Location: Pennsylvania Posts: 25 Drives: 10 Nissan 370z CB M6 Rep Power: 14	exhaust and headers question 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. thank you