Multi Tune 2024–2026 L5P Complete Package

Everything you need to make your 2024–2026 L5P off-road ready — multi-level tune, complete exhaust, and the tools to load and log it.

• UDT multi-tune — −50 / 100 / 150 / 200 HP

• 4" complete stainless exhaust (5" exhaust available as an option)

• RTD — OBD2 Bluetooth tuning, diagnostics, and data logging on your phone

• HP Tuners credits

Requirement: Your ECM must be unlocked by HP Tuners before you buy this package.

EGR: You do not have to remove the EGR. You can unplug it, or add the EGR upgrade kit as an option.

Downpipe: Adding a downpipe is not necessary. Keeping the stock downpipe will muffle the exhaust at idle or daily driving and only SCREAM when at wide open throttle. Or add the downpipe option for loud Duramax noises all the time.

Throttle valve: Unplug the throttle valve under the intake elbow, remove the flap, and reinstall (~20 min). Photo instructions included.

TCM tuning: Optional add-on on this product, or available anytime as a separate product.

Intended for off-road / competition use where allowed. Know and follow applicable emissions and vehicle laws.