Hey guys I was thinking of swapping my catback out for a 07 STI catback. Is it worth it? Any differences in terms of restriction and sound? I have a 04 wrx oem catback at the moment. Thanks.

 

are you going for a change in sound or performance? not sure about the 04 wrx exhaust other than it's a dual exhaust. but i had a oem 05 wrx catback and an 06 sti catback and the difference is only with the sound, which is minimal anyway. from my personal experience your better off getting a aftermarket catback and downpipe. good sound and a good gain in hp + tq

 

Well I already have a downpipe just trying to see if I could get more benefit from a STI catback compared to my stock 04 wrx catback.

 

the piping gets a little bigger toward the canister

 

Meaning still same restriction just a slightly bigger single tip muffler.

 

i thought the 05 and 06 wrx have single tip muffler same as the sti muffler.

 

^^It does.. The question here is, STi vs 04 wrx(dual tip)

 

why not just pick up the ERZ catback for $250?