peekeesh

I own a 99 civic lx and i'm wondering how to go about installing an aftermarket exhaust system. reason why i decided as such is because the stock exhaust manifold has a crack right on top where the o2 sensor is.

now i already have a dc headers waiting to be installed but i'm still thinking what to do about the cat converter. the lx headers and cat converter are in one piece so im not sure if i need to get a new cat or if I can re-use the cat from the stock manifold.

any advice?

thanks!