will any of the h22 cat backs fit the h23 because some places it says ( VTEC ) only will they fit my h23?

 

They won't fit without modification. The H23 exhaust piping is a little longer after the catalytic converter, because the H23's cat is shorter than the H22's cat.

 

ok so how much would i have to do and what would i do, what would be some good h23 exausts?

 

the rs*r exmag cat-back listed for the 4th gen vtec model fit my si without any modification.

 

I have a JDM h22a in place of my old h23a1. I ordered an h22a1 n-1 catback and it fit fine when I still had the h23a1 in there. I'm using a random high flow cat with my exhaust setup. not sure whether the cat is for a h23a1 or h22a.

 

My car originally had a h23 with dc cat back exhaust. I swapped in a h22 with no issues. Everything hooked right up.