Diablo Predator programmer for diesel applications. It comes with everything you need to increase the horsepower on your diesel application. It has 5 Performance settings! Tow file, 40 HP, 110 ft/lbs torque 60 HP, 145 ft/lbs torque (fuel economy performance tune) 85 HP, 190 ft/lbs torque 100 HP - 200+ ft/lbs torque. Altitude (tow file specifically made for high altitude) It also doubles as a scanner for you diesel application.