The GT Gas tuner unlocks more horsepower and torque to meet the unique demands you put on your vehicle. With preloaded tuning, customizable gauges to track performance, and a wide variety of hauling and off-roading features, youll have plenty of power to take on tough jobs or improved fuel economy for long highway hauls. Space for up to 10 custom tunes helps you adjust for the many ways you put your vehicle to the test.