Product Description
Make the most of your 2003–2004 5.9L Cummins common-rail. The Industrial Injection Double Dragon 12mm CP3 (P/N 0986437304DD) is a high-output remanufactured injection pump engineered for serious fueling demands with clean, streetable manners when properly tuned.
- 12mm stroke for major flow increase vs. stock CP3
- Remanufactured & bench-tested by Industrial Injection
- Built for 03–04 Dodge Ram 2500/3500 5.9L Cummins
- Ideal for larger injectors, turbo upgrades, and competition use
Fitment
- 2003–2004 Dodge Ram 2500/3500, 5.9L Cummins (Common Rail)
- Direct CP3 replacement for 2003–2004 model years (non-’04.5+ revisions)
What’s Included
- Industrial Injection Double Dragon 12mm Reman CP3 Pump (0986437304DD)
- Pre-installed pump hardware as provided by manufacturer
- Core return required (see notes below)
Installation & Notes
- Tuning recommended. Higher pump output may require custom calibration to fully realize benefits.
- Lift pump strongly recommended to maintain supply pressure to the CP3 under load.
- Replace any fuel filters and inspect lines during install.
- Verify injector health and rail relief status for best results.
Recommended Supporting Parts
- Lift Pump Systems – Maintain consistent CP3 feed pressure.
- CP3 Install Hardware & Accessories – Lines, seals, fittings.
- Turbo Upgrades – Pair added fueling with proper airflow.
- High-Efficiency Fuel Filter Kits – Protect your new pump.
- Tuners & Programmers – Dial in fueling and timing.
Specifications
| Brand | Industrial Injection |
| Manufacturer Part # | 0986437304DD |
| Pump Type | CP3 (Remanufactured, High Output) |
| Stroke Size | 12mm |
| Vehicle Fitment | 2003–2004 Dodge Ram 2500/3500 5.9L Cummins |
| Core Charge | Yes (return required) |
| UPC | Not published by manufacturer |
| GTIN | Not published by manufacturer |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
Core & Warranty
This item carries a refundable core charge. Return an acceptable core to receive your refund. Warranty coverage is per Industrial Injection’s policy and may require proof of proper filtration, lift pump supply, and tuning.
Helpful Links
FAQ
Do I need a lift pump with the Double Dragon 12mm CP3?Yes—high-output CP3s benefit from a quality lift pump to maintain supply pressure and protect the pump.
Will this fit late 2004 (2004.5) trucks?This listing is for 2003–early 2004 (03–04) applications. Verify your build date and CP3 style before ordering.
Is custom tuning required?Recommended. Added pump capacity typically requires calibration to optimize fueling, drivability, and EGTs. See our tuners & programmers.
What injectors pair well with this pump?Many customers combine a 12mm CP3 with larger injectors and an upgraded turbo. Consult our fuel injectors and turbo upgrades sections for build-matched parts.
Is there a core charge?Yes. Return an acceptable CP3 core to receive the core refund. Cores must be complete and rebuildable.
