like blackz87 said, since you still got the computer and what not get a chip. probably one of the easiest way to get a lil more power. You can also put a performance cam in the car. which requires knowledge and some disassemble of the motor. Only way to get real horse power is to go into the motor...

 

If you aren't parcial to the TPI you can buy a performance intake and put a nice carb on it. No more computer. If you have an auto trans a shift kit and stall will help. A manual would be a performance clutch and short throw.