How do you improve the performance of the Mazda MX-3?

easy question here. have flowmaster exhaust installed and a cold air intake also a header for exhaust would be good and port and polish both exhuast and intake manifolds. also better spark plugs and high performance wires. a good do it your self would be to dremel out your throttle body and make it a sixteenth inch larger in diameter then polish it. and yes i said dremel its the easy to use tool every one can get