GM Duramax L5P All In One Kit (2024-2026)

The 2024–2026 L5P All-In-1 Tech Kit is the most complete tuning package available for GM’s latest 6.6L Duramax trucks equipped with the new E42 ECM. Built by techs, tested on real trucks, and packaged for results — this kit gives you everything you need to tune your L5P the right way.

What’s Included in the 2024–2026 L5P All-In-One Kit 

HP Tuners GM Duramax - E42 Global B Unlock & Upgrade Service This means your E42 ECM must be removed from your truck and shipped to HP Tuners’ headquarters for servicing. This process takes up to 7 business days to complete (not including shipping) to HP Tuners 

*A Single Hp custom tune file [Choose from 5 levels with up to +180HP Gain] SOTF IS NOT AVAILABLE AT THIS TIME

8 HP Tuners credits

4” or 5” downpipe-back exhaust or the Cat & DPF Straight race pipe

TECH 1 EGR upgrade kit

Dieselr 3.5" downpipe

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