Header... Cat back... High flow cat??

so what about cat back??? are you guys saying that when i FIRST got my catback it made NO differance at all because it still had teh stock cat and manifold.. i know a few fairly high HP cars running stock cats.... which would negate your argument.. i agree save for a cat back and go from there.. then header.. i wouldn't consider the cat unless you are pushing serious power.. its JUST a civic... i mean im not saying it makes NO differance it DOES.. but its not liek some big turbo car or anything..