You have to tell us what your looking for as far as performance. You wanna drive the car everyday or do you wanna drive it just once in a while? Do you mind if it has a lope to the engine or do you want it to run smooth? There's plenty of good aftermarket cams out there. Isky cams, Lunati cams, and Erson cams. A lot of the cars now you'll have to buy a chip for the computer to let them go above the specs that were programed into your car computer or on the chip that you may now have. A good set of headers will also help you get more horsepower and a crossover tube in your dual exhaust will all help. You'll have to ask someone else about the fuel injection, I don't know to much about it. I've always carberated mine because, I don't want it to break down and not be able to fix it on the side of the road.

-VEGAS