Hello, the SCT X4 is the hand held device used to load the custom tune into your vehicles Engine Control Module ( ECM/ECU /PCM , all refer to the computer that controls the engine) So you would know if you had one of them, the ECU strategy code is what we base our custom tune on. We can get that using the VIN . You would need the UPFORD V-10 ULTRA RV TUNE , ,which includes the SCT device . The emailed Tune Only is for people that already have the SCT device .
https://www.ultrarvproducts.com/Ford-V10-UltraPower-Custom-Tuning