the basics like,header,cold air intake,2.5 cat back exhaust, play with some cam gears,may be some small stage cams and then maybe a skunk 2 intake to free up the airflow. look at it this way, you cant improve one thing with out improving its opposit. for instance if you got a skunk 2 intake and a cold air intake with a k&n filter it would pick you up some, but in return open up the exhaust with a 4-2-1 header for the torque, and a 2.5 cat back and then youll really start to notice a diffrence. then get a fuel pressure reg and start tailoring in your fuel along with some adjusable compensation with cam gears or cams. good luck.