If you are new too modding here is a good place to start reading.
http://www.grandprixforums.net/f18/w...here-1507.html
I though there was a sticky about modding but I couldn't find it. I guess the first place to start is decide how far you want to go with the car. Do you want to do a couple mods to make it faster or do you want to go as far as a turbo? Post up your plans and it will be easier for people to help you. Example, if you think you want to run headers some day don't waste your time on a down pipe.