Does your Superduty truck need a little more in the OOMPH department? The Predator is the perfect Powerstroke companion! Whether you've got an F250, F350, F450, or F550 The Predator tuner can add over 100 Horsepower, 250 ft/lbs of torque, and up to 3 miles per gallon in fuel economy with a simple OBD-II flash! If you are after towing performance, look no further. The Predator has tunes specifically designed to increase your truck's driving power while towing your factory towing capacity (Varies by truck type)! The Predator also lets you re-calibrate your truck's speedometer for larger aftermarket tires, aftermarket rear axle ratios, and even remove the top speed limiter! The long and short of it is that the Predator for Powerstroke diesel F250, F350, and F450 trucks is the best performance upgrade you can do for the money- it gets you the best power gains, best fuel economy increase, and the most options in an easy to use, handheld programmer!