Product Description
Hold rail pressure and feed big injectors the right way. The INDUSTRIAL INJECTION 237402 Dual CP3 Kit for 2003–2007 5.9L Cummins adds a second CP3 and a smart controller so both pumps share the load. Expect steadier rail pressure, lower drive stress on the stock pump, and headroom for serious power builds.
Fitment
- 2003–2007 Dodge/Ram 2500/3500 with 5.9L Cummins 24V Common Rail
What’s Included
- Second CP3 pump (included)
- Dual CP3 mounting brackets, pulley/drive and belt
- Fuel lines, fittings and install hardware
- Electronic dual-CP3 controller to split/load-balance pump command
Why It Works
- Shares fuel delivery between two CP3s to maintain commanded rail pressure under load
- Reduces demand on the factory CP3 for better reliability
- Proven 1200+ HP capable with proper air, fuel, and tuning
Recommended Parts (CPP internal links)
- ARP 247-4202 Head Stud Kit — 5.9L/6.7L Cummins
- 03–07 CP3 Injection Pumps (stroker & stock options)
- 03–07 5.9L Common-Rail Injectors
- 03–07 Lift Pumps & Low-Side Supply
- Dual-CP3 Related Fittings/Lines (03–07)
Cross-Reference / Alternatives
- INDUSTRIAL INJECTION DCP3DKIT Dual CP3 (NO pump included)
- Pair with your choice of stroker CP3 (10–14mm)
Helpful Notes
- Professional installation recommended; verify controller/loom routing and belt alignment.
- High-output setups require a quality lift pump and adequate filtration. See links above.
FAQ
Does this kit really include the second CP3?Yes — part number 237402 is the includes-pump dual CP3 kit for 03–07 5.9L Cummins.
Do I still need a lift pump?Absolutely. Dual or stroker CP3 setups need strong low-side supply and filtration for consistent rail pressure.
Will this support 1200+ HP?With the right injectors, turbo(s), fuel supply, and tuning, dual-CP3 systems are commonly used in 1000–1200+ HP builds.
Is tuning required?Your ECM calibration must be matched to your injector size and turbo airflow. Dual CP3 controller manages the pumps, but overall tuning is up to your calibration.
