The SCT 5015 Livewire TS Performance Programmer is a performance upgrade and monitor all in one for your 99-12 Ford Powerstroke. From the factory, your vehicle's computer is calibrated for the masses, designed with the average driver in mind, not the performance enthusiast. This not only leaves valuable Horsepower & Torque hidden inside your vehicle, but it also makes for a mediocre driving experience. The Livewire TS unlocks your vehicle's hidden performance by re-calibrating your vehicle's computer for Maximum Horsepower & Torque, Increased Throttle Response, Firmer Shifts and even Increased Fuel Mileage.SCT's Pre-loaded Dyno Proven tune files optimize the vehicle's Air / Fuel Ratio, Engine Timing & Fuel Curves for Maximum Performance while maintaining the factory reliability & drivability. Whether towing a fully loaded car trailer or a 5th Wheel Camper, SCT's Towing tune files add the perfect mix of Horsepower & Torque to help make hauling loads easier. SCT's Performance & Towing tune files not only optimize the vehicle for Maximum Performance, they often INCREASE the vehicle's FUEL MILEAGE by up to 1-2MPG!