SCT Performance 74940 Power Flash Programmer Handheld Tuner EFI Programmers - X4

The SCT Performance 74940 X4 Power Flash Programmer is a professional-grade, handheld engine tuning device designed for Ford gasoline-powered vehicles. Compatible with a wide range of Ford cars, trucks, and SUVs, the X4 delivers measurable performance gains by optimizing fuel, spark, shift points, rev limiters, and other critical engine parameters straight from the factory tune — or via custom tunes loaded from a professional tuner.

Key Features:

• Plug-and-play OBD-II interface — no professional installation required
• Includes preloaded SCT custom tunes optimized for power and fuel economy
• Supports custom tuning via SCT's SF3/X4 device manager software
• Built-in data logging for real-time monitoring of engine performance parameters
• Reads and clears diagnostic trouble codes (DTCs)
• Full-color, high-resolution display for easy navigation
• Stores up to 10 custom tunes on the device
• Speed calibrator for speedometer correction after gear or tire changes
• Rev limiter and speed limiter adjustments
• Device locks to one vehicle at a time; vehicle must be returned to stock before switching

The SCT X4 Power Flash Programmer connects directly to your vehicle's OBD-II diagnostic port for fast, safe flashing of the ECU. It is engineered for enthusiasts and professionals alike, offering a straightforward path to improved throttle response, horsepower, and torque — all without opening the hood. The X4 is compatible with SCT's network of authorized dealers for custom remote tuning support.