Just to help everyone out...

Heres a good one im getting most of my stuff on.
www.asylumms.com
they have everything from the dual headlight projectors to hks exhust systems the best site ive found so far for classic impreza's

www.japanparts.com

www.rg-s.com for TEIN, APEX'i, C-west and wrx wagon body parts

www.imprezars.com
www.flat4engineering.com
www.procarparts.com

Good site for the lil stuff i just found...
http://www.isrperformance.com/main.html

Check out my site ( hometown.aol.com/one2eightd/index.html ) I have a list with links to nearly all these sites, at least all the good ones.