What is the difference between HFC and test pipe?
 

Hi, Guys!

I think that this is a silly question, but I really don't know the difference between HFC and test pipe. I just know that HFC is more expensive than test pipe. :tup:

Also, will you recommend the HFCs and test pipes.

Thanks!

Rhet in Seattle

Hey Rhett,

HFC or (High Flowing Catalytic-Converter) is basically the same device that's already built into your cars exhaust system that converts the exhaust gasses.

An HFC is just a smaller cell of them that flows free-er letting you regain some performance lost. It still suffices as a cat for those states that require them and do emissions testing...

A Test Pipe or Resonated Test Pipe has NO cat of any sort in it. Resonated ones carry a resonator, but just to drown sound and rasp, not any sort of chemical conversion. So what comes out of your engine, comes out of your exhaust. (Gas wise)

HFC's will give you better numbers than Stock cats, and (Resonated) Test Pipes will give you better numbers than HFC's due to the freedom of gasses to flow.

Hopefully this broke it down for you enough to make a decision based on your particular situation. If you already knew most of that, I was not trying to make it sound as if you were not knowledgeable, just pointing out all the details. :tup:


Chris in Avondale :icon17:

Thank You Chris, for an exellent reply. a rep for your help.

The whole time I was writing it I was thinking...

"What would Trip say?"


:icon17: :tup:

Then you added waaay to much info, but thank you. :tup:

So I like to be thorough... whats so wrong with that? :bowrofl: :roflpuke2:

Thanks for the explanation (helping out another member). +1 rep :tup:

Thanks a million, Chris!! You are a great man! :bowrofl:

Finally!!! Someone speaks the truth everyone else knew but just didn't want to say out loud! :happydance:



:roflpuke2: :bowrofl:

Ok!! pickup your panties and Leave Now!!!

:roflpuke2:

great exp. +1

good info! i was wondering about the gains between the hfc's and test pipes :tup:

THx for info
I was wry the same thing... what about the sound???

Test pipes are going to be louder than HFCs. They will also be a good bit more raspy, and the well documented deceleration hiss will be more pronounced with test pipes.