Product Info
Product Info
2003-2004 Ram MM3 Tunes ONLY is organized to make fitment, included components, and ordering details easier to confirm.
Confirm the listed year, make, model, engine, and any truck-specific configuration before purchasing. Review the available tune, support, and vehicle-configuration selections before ordering. The exact contents and fitment depend on the options selected on this product page.
How to Choose Your Options
Transmission tuning: This application receives engine tuning only. A transmission/TCM calibration is not included.
- Transmission selection: Choose the option that matches the transmission installed in the truck. This selection is used to match the engine calibration and does not add transmission tuning.
- Tune quantity: Single Tune supplies one calibration for the selected setup. SOTF/Multi-Tune + Switch provides multiple tune positions and the listed switch so supported calibrations can be changed without reflashing the truck.
SOTF Tunes will only work on 2004+ Trucks. If you have a 98-03 you can only run a SINGLE TUNE.
These are custom tune files for your MM3 Device! These are some of the best custom tune files on the market for the Cummins. Unlimited Diesels writes each tune specifically for your truck and its modifications. These can be customized to suit any setup, whether it's a twin-turbo race truck or a daily driven tow rig, these are the best on the market.
If you want a single tune, choose one from the list, or let us know the type of tune you're looking for. If you want all the tunes, no input is needed, just let us know the current modifications done to your truck.
Fitment and Options
Options on this page are tied to real Shopify variants. Unavailable combinations are disabled automatically, and the cart receives the exact selected variant.
Unlimited Packages, tuners, and tunes require a decoded 17-character VIN before checkout. The VIN and verified vehicle are saved separately from your modification notes.
Bundle pages can add matching support parts with the main product. Exhaust, EGR, tips, intakes, switches, and support parts are grouped so the order stays clean.
Shipping
Shipping options and delivery times are shown at checkout. Fast air shipping may be available at checkout. Some tuning, custom-order, and VIN-matched items may require extra processing time.
Returns
Electrical, tuning, special-order, and used/installed items may have special return limits. Contact support before ordering if you are unsure.
Unlimited Diesels
Built to help you order the right diesel setup.
1Select the exact product options that match your truck.
2For tuners, tunes, and bundles, verify the VIN and add modification notes.
3Add matching support parts below the product when they are needed.
4Review the cart, then checkout with the exact selected variants.