2024-2025 Duramax L5P DieselR RTD4 Custom Tuning - Unlocked ECM Required
2024-2025 Duramax L5P DieselR RTD4 Custom Tuning - Unlocked ECM Required est en rupture de stock et sera expédié dès qu’il sera de retour en stock.
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2024-2025 Duramax L5P DieselR RTD4 Custom Tuning - Unlocked ECM Req...
2024-2025 Duramax L5P DieselR RTD4 Custom Tuning - Unlocked ECM Required est en rupture de stock et sera expédié dès qu’il sera de retour en stock.
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2024-2025 Duramax L5P DieselR RTD4 Custom Tuning - Unlocked ECM Required
The 2024–2025 L5P MPVI3 Tune File that customers have been waiting for is now available. This is a single-level, +125HP custom tuning file created for the 2024-2025 6.6L Duramax L5P equipped with the latest E42 (Global B) ECM. It’s written for the HP Tuners MPVI3 platform and designed to deliver clean power with no guesswork.
This MPVI3 custom file is dyno-tested on real 2024–2025 L5P trucks. The stock output baseline was 433HP. With this file, our dyno pulled 575HP and 1,230 lb-ft of torque. Speed limiter has been removed.. It’s calibrated for drivability, towing, and power under load — not just theoretical numbers. It’s a safe, no-nonsense first step into real E42 tuning.
To run this file, your ECM must be unlocked using the Dieselr E42 Upgrade Service. We require your VIN before purchase, and you’ll complete a tuning form after unlock.
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