The X4 Performance Programmer connects high-performance tunes to your vehicle for an immediate boost in horsepower and torque. Awaken your engine to its real potential with preloaded, dyno-proven tune files through the easy-to-use functionality. Modify a variety of parameters at the touch of a button, all while monitoring gauges on a customizable display.SCT X4 50 State Legal Device.Features and Benefits50 State Legal Backs Up Factory Tune Carb EO: D-784-10 CUSTOM TUNING: Load up to 10 custom tune files DIAGNOSTIC TOOL: Read and clears DTC (Diagnostic Trouble Codes) High Speed Data logging & monitoring Installs quickly and easily PERFORMANCE: Preloaded, dyno-proven tunes boost power & torque TUNER/MONITOR: Read vehicle data on a full-color LCD display User Adjustable Tune Options User adjustable Vehicle ParametersSCT X4 50 State Legal DeviceProp 65 Yes/No: NoTitle: SCT X4 50 State Legal Device