SCT X4 W/GDP Support Pack (2020-2021 6.7L Powerstroke)

The SCT X4 w/ GDP Support Pack for 2020–2021 6.7L Powerstroke is a complete tuning solution for Ford diesel owners who want properly supported custom tuning without piecing together hardware and files separately. This package combines the SCT X4 handheld device with GDP’s Powerstroke-specific tuning support, built specifically for the 6.7L platform.

The SCT X4 is a proven handheld tuner that connects directly through the OBD-II port and provides fast flashing, live data monitoring, and onboard diagnostics. Shipped as part of this bundle, the X4 is configured to work seamlessly with GDP tuning files and support, making it a reliable option for daily driving, towing, or performance-focused setups.

What separates this package from a blank device is the included GDP Support Pack. GDP’s calibrations are built for controlled fueling, consistent power delivery, and stable drivability across multiple power levels. The tuning files are designed to work within the limits of the factory hardware while improving throttle response, shift behavior, and overall truck operation.

This package supports Switch-On-The-Fly (SOTF) functionality, allowing you to change power levels on demand when paired with the proper switch. Transmission tuning is also included to improve shift strategy and towing behavior when used with compatible setups.

Files Included

• Level 1–4 engine tune files

• SOTF tuning support

• Transmission tuning (application-specific)

Hardware Included

• SCT X4 Handheld Programmer
• OBD-II cable
• PCM unlock cable

Vehicle Fitment

• 2020–2021 Ford Powerstroke 6.7L

Why Choose This Package

• Complete device + tuning support in one bundle
• Built specifically for 2020–2021 Powerstroke trucks
• Supports SOTF and transmission tuning
• Reliable daily and towing drivability
• No guessing on compatibility

This SCT X4 w/ GDP Support Pack is ideal for Powerstroke owners who want a supported tuning setup that works cleanly from the start, without locking themselves into unnecessary hardware or unsupported files.