Running an 09 2.5i and just put a CAI in it a while back. Now looking to get that rumble from a catback. Thinking of running a tsudo n1 08-10 wrx exhaust and probably getting some rallisport UEL headers. I know its a costly thing but want that rumble sound and not looking for huge gain either way. Any other ideas you all could throw at me LET ME KNOW!. Looking for any advice Thanks!

 

Watch out on those headers. Even with the "factory" cat, the o2 sensor may still not get a proper reading and throw a CEL. From what I understand, it's been hit or miss.

Catbacks are pretty much open to your taste.