Basically it will advance ignition timing (more power), adjust tranmission shift points and kill the stock limiter. But the more modifications you do to your car, the more power it makes. Also if you run 91+ octane gas you make more power. I also suggest 180 degree thermostat, intake, exhaust are the most basic modificatoins you should do
Installation is a breeze. Just located the PCM underneath the driver side of the dash and plug the chip in. It will take you a total of 30 mintues and its comes with detailed instructions. The chip is more worth it after you have done some of the basic modifications to open up your car'* engine.
ADTR 1999 Black Bonneville SE
2003.5 Yellow Mazdaspeed Protege
2003 Azure Blue Mach 1 Mustang