HFC's only?
 

Would I get an HP increase by adding only HFC's alone and would it increase my exhaust note as well? Not looking for excessively loud exhausts just a little more "Rumble" than stock. Also looking at adding HPS post MAF tubes. Thanks in advance! :tiphat:

yes and yes and not too loud

I was running with just HFC's for about 5 months before I got my CBE.
I noticed a nice bump in power and a more aggressive sound as well. It was louder but not obnoxious.

If you are looking for a set of HFC's let me know. I have a lightly used pair of Berk's for sale.:tup:

Berk HFC's for sale

If you want some more rumble but don't want it loud at all get the invidia gemini catback!

Would someone be able to pass an emissions test with HFC's ?

Yes, should def be legal with HFC....test pipes or ART pipes...ffuggeeedduubbooddiit

Yep, in fact many new cars could technically pass emissions with test pipes as the engines are clean and efficient enough.

Well then, HFC's just made my list then.. I would hate to have to replace
with the stock cats every year just to pass emissions...

Here in TX we have exhaust emissions testing for vehicle inspection..

lol yeah we do! There allot of places that just sign off....i keep going back to them!

Yeah, I used to know those places, but they are all out of business.... But I'm good with HFC's..