20-21 Ford Powerstroke SCT X4 device with GDP Support Pack SOTF levels 1-4 and trans tuning all included (EPA Compliant tuning only)

The GDP SCT X4 Support Pack provides custom file support for 2020–2021 6.7L Powerstroke owners running the SCT X4 platform. This pack is designed for customers who already have a properly unlocked PCM through SCT and need GDP-calibrated files. It does not include an SCT X4 device, a PCM unlock service, or a hardware tuner. It is strictly a file support package for existing SCT X4 users with a compatible unlock. Once SCT approves the PCM unlock, GDP provides Powerstroke-specific calibration support that improves shift behavior, throttle feel, and towing confidence. Every file is built around real 6.7L data to maintain reliability and predictable drivability.