Nameless Performance sells a great piece. (Axel back, a few options on the look, for fairly cheap).
I just got the single wall flush cut exhaust for $336 shipped to my doorstep. The stock exhaust, even though I have a 2013 WRX was hard to get off by myself. It is nice to have another pair of hands or a lift, but it is possible to do by yourself.
I give it two thumbs up!
13 WRX - Current - Nameless Axelback
03 Audi A4 1.8t SOLD
06 STi - Minor mods SOLD