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2011 Nismo#91 · 08-09-2013, 12:15 PM

Hi,

I search on here and in genearl about 3" Exhausts. It seems there are many 3" Downpipes, headers, and cat backs. But all HFC seem to use 2.5" tubing, at least that I can find. Why are there no 3" HFC? There must be a reason or I am just not understanding something about exhausts and am asking a stupid questions.

08-09-2013, 12:15 PM	#1 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	3" Exhausts and HFC Question Hi, I search on here and in genearl about 3" Exhausts. It seems there are many 3" Downpipes, headers, and cat backs. But all HFC seem to use 2.5" tubing, at least that I can find. Why are there no 3" HFC? There must be a reason or I am just not understanding something about exhausts and am asking a stupid questions.