The Bully Dog GT Gas Performance Tuner and Monitor enhances fuel economy (40417) unlocks more horsepower and torque to meet the unique demands you place on your vehicle. With pre-loaded tuning, you can simply plug and play. Customizable gauges track performance for a wide range of hauling and off-road applications, providing significant power for tough jobs or improving fuel economy for long highway cruises. The all-in-one display and monitor provide a full-color display with customization, vehicle-specific download features, and the ability to read and clear diagnostic trouble codes.