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.

I think there's two 3" Z exhausts. GTM and FI. Fast Intentions sells a 3" exhaust with cats. 3" exhausts are for turboed cars. 2.5" is far more common because that's a good diameter for NA cars, and most people leave their Zs NA. Most people don't run cats on their turboed Z, leading to few people making 3" HFCs.

Thanks for the quick reply. I was updating/revising my FI build list when I noticed the diameter difference. 3" TP would be nice and cheaper money wise, but I worry in NJ it wont pass emmisions test I do believe they still check the tail pipe. I looked on FI's site and didn't notice a stand along 3" cat, I will have to look up the exhaust with the cat option.

Went back to both mfg sites and don't see 3" Cats just 2.5" Cats and 3" Catbacks it listed there. =/

With the Fast Intentions setup, it may not be on their website. Give Tony a call and he'll set you up right.

It's ok, just making a list of items and checking it twice.