What’s Included
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Tuning Configuration Options
Choose between a single performance tune or Shift-On-The-Fly (SOTF) tuning.
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MPVI4 Tuning Interface
Industry-leading hardware for advanced Duramax ECM tuning and diagnostics.
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Six (6) Universal Credits
Required for ECM unlocking and flashing.
- Coolant Upgrade Kit (MADE IN THE USA)
- Downpipe (MADE IN THE USA)
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Diagnostic Plug Kit (MADE IN THE USA)
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Exhaust Choice
Performance Levels
Performance Diesel Worx custom calibrations include size selectable power levels designed for everything from stock-like operation to aggressive performance.
- Level 0: Stock Output
- Level 1: +30 HP
- Level 2: +80 HP
- Level 3: +135 HP
- Level 4: +160 HP
- Level 5: +210 HP
With Shift-On-The-Fly enabled, power levels can be changed instantly using factory steering wheel controls, allowing on-demand adjustment without stopping or reflashing.
