Unlike the fixed tuning used by others, the Derringer features three power settings: Stock, Sport, and Plus. The Sport produces best-in-class performance that knocks you back in your seat. The Plus setting is for work use and has great mid-range feel. When running Plus with a loaded work truck and/or pulling a trailer, your on ramp merging speeds and passing times are greatly improved. The Derringer is the only tuner on the market that actually utilizes your truck's ECU to make intelligent calculations. Order the programmer recommended for your vehicle and engine application.Additional features of Banks Power Derringer tuner systems include: . Easy to install. ActiveSafety (on select models) protects engine/powertrain. Add up to 61 hp and 112 lbs.-ft. of torque. Shaves 4 seconds off 0-100 mph times. Interfaces with OBDII Port (On-Board Diagnostics/Information) to communicate directly with the vehicle ECU. Valued-priced and loaded with many more great features.