2003–2007 Cummins 5.9L CP3 Injection Pumps (Stock & High Performance)

CPP Diesel supplies CP3 high-pressure fuel injection pumps for 2003–2007 Dodge Ram Cummins 5.9L common rail engines. We offer dependable stock replacement CP3s and high-performance builds from Exergy Performance in 10mm, 12mm, and 14mm stroke sizes for applications ranging from towing to all-out competition.

Our CP3 pumps are assembled and tested to exact specifications, ensuring reliable rail pressure and consistent fueling at any power level. We also offer dual and triple CP3 kits for extreme horsepower demands.

Frequently Asked Questions

Which CP3 pump is right for my 5.9 Cummins?

For stock trucks or towing, go with the OEM replacement CP3. For higher horsepower builds, choose an Exergy CP3 in 10mm, 12mm, or 14mm depending on your fueling needs and turbo setup.

Can I daily drive with a performance CP3?

Yes. A 10mm or 12mm CP3 from Exergy can be daily driven when paired with the correct injectors and tuning, while still supporting significant horsepower gains.

When should I upgrade to dual or triple CP3s?

If you’re exceeding the limits of a single pump—common in high boost, high horsepower builds—dual or triple CP3 setups stabilize rail pressure and prevent fuel starvation under load.

Do you bench-test CP3 pumps?

Absolutely. Every CP3 is tested for flow, pressure stability, and proper operation before it leaves our shop.

Do you offer installation support?

Yes. We can guide you through CP3 installation, break-in, and tuning recommendations to get the best results from your build.

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