A cheaper solution is to get your hands on a STi CBE , mod it to fit .
I can't justify spending that kind of coin on go fast(er) goodies , so i picked up a 2013 STi stock CBE an modded it to fit on my Outback . there was a fella on here that did it on his Legacy 3.6R and i can confirm it sounds pretty nice , it's not loud even at wot to the point it draws attention or gets you in trouble.