I am going to post a nice reply before some tries to tear you a new one. There is a LOT of great info under specific sub forums that will answer your question exactly. Please start there as well as using the search button. If you find some info that you don't fully understand or just have a question about feel free to post it. I am sure others will post on this tread a similar comment with out being so kind. Welcome to the suby family and enjoy that wrx I had an 02 myself and loved that car. Traded it in 2 years ago for a legacy gt and still miss it to this day.