Sounds like you need to do some reading. Tuning a WRX is a very much different from a typical import. Sure there are similarities, but if you take say a Honda tuning path that could very much improve your Honda, it could ultimatly destroy a WRX. There is a lot of good information on this site. I recommend a coke, some popcorn, and a comfy mouse pad. Then after that, if you have any specific questions, we'd be glad to help.
"We live for a good time, not a long time."
RIP Colin McRae