Hey Matt welcome bud! In your situation the only safe mods you can do is a cat back system and a k&n panel filter any other mods Your car will have to be tuned because it will over boost then go ka boom witch you don't want to happen Like ms700 said a good tuner witch there is a chit load in Sydney will work with you to what ever power levels you Want but be careful because there is a lot of sharks out there !!!