INJECTABLES

Build safe, controllable power on your 2003–2007 Dodge Ram 5.9L Cummins with proven injectables. Whether you daily tow, sled pull, or make weekend passes, water-methanol, nitrous oxide, and propane systems can lower EGTs, improve spool, and add horsepower when set up correctly. Shop CPP Diesel’s curated selection for 3rd-Gen 5.9L.

Shop by System

Water-Methanol Injection — Quenches intake charge and helps control EGT under load. Ideal for towing and competition.
- 03–07 Injectables Category
- Universal Water / NOS / Propane
Nitrous Oxide (Diesel) — Oxygen enrichment for rapid spool and serious top-end power. Pair with proper monitoring and tuning.
- 03–07 Injectables Category
Propane Fumigation — Improves combustion efficiency at light/medium load and can enhance mileage when used responsibly.
- Universal Water / NOS / Propane
Intercooler Sprayers (CO₂/Cryo) — Drops charge-air temps on demand to fight heat-soak in competition.
- 03–07 Intercoolers & Boost Tubes

Recommended Supporting Upgrades

Gauges & Monitoring: Boost, EGT, trans temp, and fuel pressure are must-haves with injectables. 03–07 Gauges / Related
Tuning & Data: Optimize timing/fueling and log data for safe power. 03–07 Tuners / Chips / Monitors
Heat Management: Wraps, shields & blankets reduce under-hood soak when adding power. 03–07 Heat Control Products
Airflow & Charge-Air: Stronger tubes, boots & intercoolers for higher boost. 03–07 Intercoolers & Boost Tubes
Fuel Supply: Keep rail pressure stable under load. 03–07 Fuel System Components

Top Brands We Trust

Scheid Diesel — competition-proven injection solutions and hardware. Shop Scheid Diesel

Why Buy Injectables from CPP Diesel?

3rd-Gen Cummins specialists: Fitment help for 2003–2007 trucks.
Competition & towing focus: Practical recipes for EGT control and reliable gains.
Brands you know, tech you can trust: From universal kits to 5.9-specific plumbing.

Frequently Asked Questions

Are water-methanol kits safe for my 5.9L common-rail?

Yes—when jetted conservatively and monitored (boost/EGT/fuel pressure). Start small, verify no misfire or surge, and data-log. Pair with a failsafe that cuts spray on low tank, low flow, or low boost. See Gauges / Related.

Do I need tuning for nitrous or water-meth?

Many basic water-meth setups can run on stock tuning if used for cooling. For performance spraying or nitrous, custom tuning and progressive control are strongly recommended. Visit Tuners / Chips / Monitors.

What nozzle size should I start with?

There’s no one-size-fits-all. Start conservatively based on your power goals and turbo(s), then datalog EGT/boost to adjust. CPP can help size nozzles for towing vs. competition.

Is nitrous/propane street-legal?

Many systems are labeled “for competition/off-road use only.” Check local and federal laws before use on public roads.

What other parts should I upgrade first?

Ensure the fuel system can maintain commanded rail pressure, upgrade intercooler piping/boots, and add heat control. See Fuel System, Intercoolers & Boost Tubes, and Heat Control Products.

Note: Always verify component compatibility and intended use. Competition parts may void warranties or violate emissions laws.

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