I have an 06 Civic SI and am currently pursuing a great exhaust system on it as I also have a skunk CAI that should run great together. At first I thought all I need is a cat back exhaust but got to looking at my stock cat and it looks as if it’s falling apart. Does anyone know if I buy a high flow cat is that a stock cat replacement and then will be able to hook a cat back exhaust system to that? I know this is pretty elementary to some but just trying to figure it out. Thanks!