S&S Diesel CP3-CU-12 — New 12mm CP3 (6.7L-Based) for 2003–2018 Ram Cummins 5.9L/6.7L 24V

Serious fueling made simple. The S&S Diesel Motorsport CP3-CU-12 is a brand-new, 6.7L-based 12mm CP3 engineered for stable, efficient fuel delivery across the rev range. It’s the go-to single-pump upgrade for 03–07 5.9L and 07.5–18 6.7L Cummins builds that demand clean power with OE-level reliability.

• 12mm displacement (≈1,590 mm³/rev) with S&S internal mods for high-rpm consistency.
• Brand-new (not reman) CP3 based on the robust 6.7L architecture.
• Proven up to ~1000 HP (single pump, with supporting mods) while maintaining drivability.
• Data sheet included in the box for proper calibration; 2-year manufacturer warranty.

Fitment

• 2003–2007 Ram 2500/3500 — 5.9L Cummins 24V
• 2007.5–2018 Ram 2500/3500 — 6.7L Cummins 24V

Note: All S&S Cummins CP3s are 6.7L-based. On 5.9L trucks (2003–2007), minor fuel line modification is required during installation.

What’s Included

• 1× S&S Diesel CP3-CU-12 (new 12mm CP3, 6.7L-based)
• Manufacturer documentation / data sheet

Hardware, lines, lift pump, and tuning are not included unless stated.

Recommended Parts & Related Categories

• Lift pump / filtration support to protect the CP3:
  • FASS NDTSD07100G (05–18/21–23 Cummins)
• Dual-pump hardware & accessories (for high-HP builds):
  • 2003–2007 Cummins Dual CP3 Kits & Parts
• Browse CP3 pumps & components:
  • CP3 Pumps & Components (Cummins)

Helpful Notes

• Verify injector / turbo / tuning match your fueling goals; the CP3 alone does not add power without supporting mods.
• On 5.9L installs, plan for the line modification noted above.
• Follow proper priming and cleanliness procedures to protect your new high-pressure pump.

FAQ

Yes. It is a 6.7L-based pump that fits 2003–2007 5.9L and 2007.5–2018 6.7L. For 5.9L trucks, minor fuel line modification is required.

Brand-new. S&S builds these from new 6.7L-based CP3 units with internal performance enhancements.

With proper injectors, turbo(s), and tuning, a single S&S 12mm CP3 can support builds approaching ~1000 HP.

Strongly recommended. A quality lift pump/filtration system helps maintain supply pressure and extends CP3 life. See our FASS recommendation above.

Tuning isn’t included, but many builds benefit from calibration to optimize rail pressure and fueling. Always follow S&S documentation included with the pump.