y7 exaust mani or y8?
 

there is a thread related to this i kno, but i didnt wanna jack that thread

my question is if i was to get hi flow cat, on my y7 engine, would it cost more to do that mod rather than to get a y8 mani and have them intall a cat right onto that...i'm getting a cat back next month so i need to kno what problems i might face doing so

by the way, will i pass emissions with a hi flow cat?

thx