SCT X4 with DIESELR Tune Files (2020-2021 Powerstroke 6.7L)

DIESELR X4 Tuner + Custom Tune File Pack

This tune pack combines the powerful SCT X4 tuner with our expertly developed DIESELR Tune Files to deliver peak performance, reliability, and drivability for your diesel truck. With an easy-to-use interface, the X4 lets you fine-tune horsepower, torque, throttle response, and fuel efficiency in just a few clicks. Backed by real-world testing and crafted by experienced tuners, our custom files are built to get the most out of your setup—whether you're towing, daily driving, or pushing limits on the trail.

Horsepower Gains (At Wheel, Engine):

Level 1: 40+ HP
Level 2: 80+ HP
Level 3: 120+ HP
Level 4: 180+ HP
Level 5 SOTF: 220+ HP

Estimated Torque Gains (To the Wheels):

Level 1: ~80 ft-lbs
Level 2: ~160 ft-lbs
Level 3: ~240 ft-lbs
Level 4: ~360 ft-lbs
Level 5: ~440+ ft-lbs

• What’s Included:

  • ✔ Custom DIESELR Tune Files – Power Levels 1–4 included

  • ✔ SOTF (Switch-On-The-Fly) – Instantly switch between power levels while driving

  • ✔ Transmission Tuning – Refines shift points and improves torque delivery

  • ✔ SCT X4 Handheld Programmer – User-friendly tuner with built-in display

  • ✔ OBD-II & PCM Unlock Cable – All necessary hardware for setup and flashing

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  What’s Required for Tuning:

  • ✔ SOTF Switch with Mounting Bracket (Optional) – Enables power level switching from the cab

  • ✔ Exhaust System – Enhances airflow and supports maximum performance

  • ✔ EGR Upgrade Kit (Optional) – Reduces restrictions, promotes engine longevity

  • ✔ Remote Support (Optional) – Live tuning assistance available HERE

  
  

Why Choose DIESELR SCT Tune Files?

Customized Solutions: Each tune is specifically calibrated for the 6.7L Powerstroke using the SCT platform, ensuring seamless integration, optimal performance, and safe power delivery.
Proven Performance: Backed by extensive testing in real-world conditions, these tunes consistently deliver impressive gains in power, torque, and drivability.
Support and Updates: Optional remote support is available to help dial in your setup, with access to updates that keep your truck performing at its best.

Note:
Power levels listed above are based on horsepower output — not traditional drive modes like Tow, Street, or Performance. These are raw performance levels and do not follow economy/tow/street/performance naming conventions.