Calibrated Power | 2024-2026 GM 6.6L L5P Duramax Custom ECM Emission Compliant Tuning & Unlock Package

L5P owners—your wait is over. Custom emission compliant ECM tuning is officially available, adding up to +110 HP / +330 ft-lbs, while keeping emissions intact.

• Add up to +110HP and +330 ft-lbs of torque
• Designed to work with your stock emissions system in-tact
• Fully customized tuning optimized for your stock or modified truck
• Custom Tune for aftermarket upgrades like drop-in turbo upgrades and injectors
• Designed to be safe for your engine and emissions equipment
• Improved pedal response for better power delivery
• More power and less soot than box programmers
• Speed limiter adjustments
• Revert back to stock tuning at any time
• FREE - World Class Customer Service Phone Support!
• USA based tuner with over 16+ years of diesel tuning experience
• TCM Tuning for 24+ 10-Speed L5P's now available!

What's Included:

• (1) Custom Tune(s)
  • Single Tune or...
  • 4 Tune Pack
• Free Lifetime Tuning Support
  • Customer support for anything you might run into along the way
  • Adjustments for tire size, altitude changes, or calibration improvements. 
• HP Tuners Credits (Required)
  • (8) Credits required for unlocking and tuning your 6.6L Duramax ECM
  • (4) Credits required for unlocking and tuning your 6.6L Duramax TCM
• HP Tuners RTD4 Flash Tool (Required)
  • Connect > Read > Write > Drive.
  • Equipped with Bluetooth® mobile device support
  • Makes it faster and easier to read, edit, and write your vehicle’s software.
  • One of the most powerful scanning, diagnostic, data logging, and calibration flashing tools on the market.
• ECM Unlock Service 
  • Unlocks your factory ECM to allow custom tuning file upload
  • 3-5 buisness day turn around
  • Required for flashing tune files to your 2024,2025 and 2026 L5P ECM
• Round Trip Shipping
  • We cover shipping for ECM + TCM bench unlocking
• (Optional) TCM Tuning
  • Adjusts TCM Tuning calibration to optimize power from custom ECM tuning
  • Customized adjustments available 
  • Unlocked T93 TCM Required