high flow cat...

will a high flow cat. affect emissions? another question, i plan to turbo my KA motor in a little while..not soon but about a year.. and i want to know if i would be able to keep my same Apexi exhaust and high flow cat. thanks for the help

I think it's only the header that replaced by the turbo and exhaust manifold, but from the cat, back (get it :-P) it should be the same.

I think it's only the header that replaced by the turbo and exhaust manifold, but from the cat, back (get it :-P) it should be the same.


lol yeah i knew about the headers, but thanks for the answer. i appreciate it.

what the size for the cat?

what the size for the cat?

what are you asking? :confused:

I think he means the diameter of the piping.

Yeah, if you plan to turbo, you want to run a bigger than stock pipe. All that air needs somewhere to go right.
As far as the high flow cat... you were wondering if you would still run legal right? pass emissions? I think it depends on the cat, but most of them are intended to be street legal. You could always ask your emissions peeps what the rules are for your area.

Yeah, it should be street legal or else why have a cat? Just have a straight pipe.

Yeah, it should be street legal or else why have a cat? Just have a straight pipe.

i have a 3 inch exhaust right now so thats good for turbo. the cat. has the same outlet.