SCT SF3 Flash Tuners are Pre-Loaded with Dyno proven files that increase Horsepower, Torque, and even fuel mileage for your performance vehicle. The SCT Power Flash Programmer reads and clears Vehicle trouble codes- Offers Adjustable - WOT Fuel adjustment, Spark Adjustment, Axle Ratio, Tire Size, Cooling Fan Temps, Rev/Speed Limits, Idle Rpm, Transmission Shift Points, Fuel Injector Size, Cold Air Intake Selection, Traction Control - On/Off, Two Step ON/OFF RPM and much more !!!