Product Description
Hold rail pressure and feed big injectors the right way. The INDUSTRIAL INJECTION DCP3DKIT adds a second CP3 to your 2003–2007 5.9L Cummins so each pump shares the load, lowering drive stress and maintaining commanded rail pressure under heavy throttle. Includes II’s smart dual-pump controller, stock-horn–friendly brackets, and HD belt routing for a clean, reliable install. (No pump included.)
Fitment
- 2003–2007 Dodge/Ram 2500 & 3500 with 5.9L Cummins common rail
What’s Included
- Upper pump brackets, idler/pulley hardware, and mounting fasteners
- Smart dual CP3 controller & harness
- HD serpentine belt (spec: Gates K081362HD)
- Lines/fittings and install components for stock-horn configuration
- Note: No CP3 pump is included. Designed to run a top (second) pump based on the LBZ Duramax CP3 architecture.
Key Benefits
- Shares fuel delivery load between two CP3s to reduce drive stress on each pump
- Holds commanded rail pressure under high boost/fueling to cut EGT and smoke
- Controller failover: if one pump fails, the controller assumes control of the remaining pump
- Proven to support 1200+ HP with appropriate fuel/air mods
Recommended Parts (CPP internal links only)
- CP3 Injection Pumps for 2003–2007 5.9L (stock to 10/12/14mm)
- Cummins 4932457 OEM FCA (CP3 metering valve) — 03–07 5.9L
- Fleece Dual Pump Controller (spare/upgrade)
- 03–07 Dual CP3 Hardware, Belts, Pulleys & Lines
- ARP 247-4202 Head Stud Kit — 5.9L/6.7L
Cross-Reference / Alternatives
- Industrial Injection 237402 — Dual CP3 Kit with pump (03–07)
- Shop CP3 pumps (stock & stroker) for your top or bottom pump
Helpful Notes
- Designed to work with the stock intake horn. Aftermarket horns may require modification.
- Use the specified Gates K081362HD belt or equivalent for correct wrap and tension.
- Plan injector and turbo sizing to match the added fuel — lift pump and filtration upgrades strongly recommended.
FAQ
Does this kit include a CP3 pump?No. DCP3DKIT is the hardware + controller package. Pair it with your choice of stock or performance CP3 from our 03–07 category.
What pump style is recommended for the upper position?The system is designed to use an LBZ-style CP3 for the top position. See our CP3 category for compatible options.
Will this help hold rail pressure with big injectors?Yes. Splitting delivery between two CP3s helps maintain commanded pressure under heavy load, improving consistency and reducing EGT with the right tune and airflow.
What happens if one pump fails?The included controller can hand off full control to the remaining pump to keep you moving while you diagnose.
