Remember I asked this question about a month ago? I was just browsing forums, and noticed someone did a write up on that very thing. Gave some props to SMC for their work on Turbo Regals, and this guy installed one in his WRX.
http://www.scoobymods.com/forums/showthread.php?threadid=1676
http://www.scoobymods.com/forums/showthread.php?threadid=1676