Looking for maximum power and reliability without the downtime of sending in your ECM? Our HP Tuners File-Only calibration for the 2017–2023 L5P Duramax delivers factory-smooth drivability with race-tested performance...
Looking for maximum power and reliability without the downtime of sending in your ECM? Our HP Tuners File-Only calibration for the 2017–2023 L5P Duramax delivers factory-smooth drivability with race-tested performance built 100% custom for your truck and your exact setup.
Whether you’re towing heavy, daily driving, or chasing peak efficiency, this tune unleashes the power your L5P should’ve had from the start no gimmicks, no smoke, just clean, optimized performance.
⚙️ What’s Included:
✅ Custom-Written File for Your VIN – Personalized calibration built specifically for your truck.
✅ Compatible with HP Tuners MPVI2 / MPVI3 – Works with your existing interface and credits.
✅ Emissions-Intact or Deleted Options(off-road use only) – You choose your setup.
✅ Transmission Tuning Available Separately – For 10-speed T93 or 6-speed T87A platforms.
✅ Safe, Reliable Power Gains – No smoke tunes or lazy fueling just optimized performance and efficiency.
🧠 Why Choose Piston Twistin:
Every file is hand-built in-house using HP Tuners VCM Suite, with data-driven adjustments for fueling, timing, boost, and torque management. No cookie-cutter maps, no unsafe fueling just a precision-calibrated tune that keeps your L5P running stronger, cooler, and cleaner than ever.
You’ll feel the difference immediately quicker throttle response, smoother shifts, more torque under load, and a truck that finally drives the way it should.
✅ Requirements:
HP Tuners MPVI2 or MPVI3 interface
Applicable HP Tuners credits (not included)
Unlocked ECM or compatible standalone MG1 tuning solution
🔒 Notes:
Safe for daily driving, towing, and performance use.
Emissions-off calibrations are strictly for off-road or race-use only.
