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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,

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Old 08-09-2013, 12:15 PM   #1 (permalink)
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Question 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.
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