SCT Performance - 7416 - X4 Performance Tuner - Custom Power Flash Programmer- 99-14 GM Wide Model Fit: Fitting a wide array of GM Models 1999-2017. Enter your vehicle above to verify compatibility. Vehicle Data Overload: The X4 Power Flash makes it easy to read the real time vehicle data, view popular sensor data such as EGT, Air / Fuel Ratio or any other 0-5 Volt source! Ready To Go: The X4 Power Flash arrives pre-loaded with DYNO proven tune files that increase Horsepower and Torque. Custom Tuning: Control your vehicle's performance fully with custom tune capability and an adjustable tune interface. Custom tunes can be purchased from any SCT Custom Tuning Dealer Easy Updates: Built-in Wifi allows you to easily attach to your local area wireless network to download device updates.