Found this website yesterday, and while it's obviously not a complete source of information and probably is inaccurate to some degree, I figured I'd share.

http://www.cars101.com/subaru/impreza/wrxsti2004.html

Also some performance stats (not sure how they tested it but I guess someone did):

http://www.car-videos.com/performanc...?id1=169&id2=0