Hello, i have a 1997 cavalier and want to supp it up, i already have a k&n air filter and headders but would like to know if a turbo charger is really what i need next. i am open to all information, 9mm sparkplugg wires, ecu chips exc. its already set up and has no2. if a turbo is a must than which brand should i get? Thanks a lot - mitch.