SCT X4 Performance Programmer and Tuner

Unlock more horsepower, torque, throttle response, and vehicle control with the SCT X4 Performance Tuner and Programmer. This compact handheld tuner installs preloaded, dyno-proven SCT tunes on supported vehicles and stores custom tunes created by an SCT custom tuning dealer.

Key Performance Features

• Dyno-Proven Tuning: Improve horsepower, torque, throttle response, transmission behavior, and overall drivability on supported applications.
• Up to 10 Custom Tunes: Store custom tune files created for your vehicle, modifications, and performance goals.
• Real-Time Vehicle Data: Monitor engine and powertrain parameters on the X4’s easy-to-read, full-color display.
• Adjustable Parameters: Modify supported settings such as fuel octane, rev limiter, speed limiter, axle ratio, tire size, and shift behavior.
• Built-In Diagnostics: Read and clear diagnostic trouble codes, including many check-engine-light codes.
• Easy OBD-II Programming: Connect the X4 to your vehicle’s OBD-II port and follow the on-screen instructions to install your selected tune.
• Internet Updates: Update device software, firmware, and vehicle coverage using SCT’s Device Updater software.

Vehicle Compatibility

Top Supported Makes: Ford, Chevrolet, GMC, Dodge, Ram, Jeep, Lincoln, Mercury, Chrysler, Cadillac, Hummer, Pontiac, and Oldsmobile.
Compatibility and tune availability vary by year, make, model, engine, vehicle calibration, and selected SCT X4 part number. Use the vehicle selector above to confirm fitment.

Emissions Compliance

SCT tuning devices will not modify or delete vehicle emissions equipment. SCT products and preloaded tunes comply with Clean Air Act requirements. Custom tuners are required to follow all applicable emissions regulations.

Disclaimer: Performance, available tunes, and adjustable features vary by application. Use the vehicle selector above to confirm compatibility and select the correct SCT X4 part number.