The wrx catback is considered the "ideal" size, 2.25" diameter for an N/A motor (2.5rs/i). I use that catback on my car and love the stock look with a little more rumble than stock with no buzzing.
could you break the pieces down (cat back/axle back) please? if you can. i will be there after i eat my frozen pizza. 1220-1230 ish? -Dan
I've had an entire cat back in my 02 without taking the seat out. It went all the way to the dash, but it fit.