Anyone running these HFCs? I'm about to buy these for $325 brand new. I've got a HKS catback exhaust and I'm wondering if it will sound decent. Im not looking for rasp at all. I love the exhaust note now but I want it louder. Also will I gain any HP with these?

 

What vendor? That's like 40% of z1's price, doesn't sound legit.

 

if you have factory cats now, going to HFC is going to lean you out some, and could possibly cause you to lose power.

 

Its a private seller. SO basically if i get these I need to go get a tune...

 

Not as bad as if you went test pipes....but preferred.

 

For a bit more you can get a better brand....

 

What brands do u prefer.

 

aam, kinetix, z1.... all sub 400