Custom HP Tuners engine tuning for 2003–2007 5.9 Cummins trucks. Built for real-world performance, drivability, and reliability — not generic files.

This tuning is tailored to your setup with support, logging, and revisions as needed to ensure your truck runs exactly how it should.

Designed to improve throttle response, power delivery, and overall drivability while maintaining a clean, consistent calibration.

HPT Tuners 03-07 Cummins 5.9

Please note any modifications

The Tow tune LVL 1 built to enhance low-end power

The street tune LVL 3 is an all-out sport feeling with great power and better fuel mileage

The race tune LVL 6 is a max effort tune, pushing the fuel system to maximum fuelling, stock engines will be around 450hp at the wheels.

LVL 1 to LVL 6