S&S Diesel CP3-CU-14 14mm High-Pressure Injection Pump

The S&S Diesel CP3-CU-14 is a brand-new 14mm high-pressure CP3 injection pump engineered for serious 5.9L and 6.7L Cummins applications. Built on a 6.7L-based core, it delivers a substantial 1,850 mm³/rev displacement to support high-horsepower builds while maintaining stronger rail pressure at elevated RPM where stock pumps begin to fall off.

This is a new unit (not remanufactured) with no core charge. S&S has modified the internal geometry for improved high-speed efficiency and durability under the high mechanical and thermal loads of modern common-rail systems. It is a strong choice for street performance, towing, sled pulling, and competition applications that have outgrown stock or smaller stroker pumps.

Key Features

• 14mm stroke / approximately 1,850 mm³/rev displacement for high-volume fuel delivery
• New 6.7L-based construction for improved output and longevity
• Enhanced high-RPM fueling capability compared to OEM pumps
• Hybrid aluminum and steel construction for strength and reliability
• Supports high-horsepower single-pump setups (commonly rated in the 1,200–1,400 hp range depending on the rest of the fuel system and tuning)

Fitment

• 2003–2007 Dodge Ram 2500/3500 5.9L Cummins (common rail)
• 2007.5–2024 Ram 2500/3500 6.7L Cummins (CP3-equipped or converted applications)

Important Installation Note: All S&S CP3 pumps for Dodge/Ram trucks are built from a 6.7L-based pump. When installing on a 2003–2007 5.9L, modification to the stock high-pressure fuel lines is required (a 5.9L-to-6.7L CP3 fuel line adaptation kit is typically needed). Proper lift pump support (200+ GPH recommended) and custom tuning are strongly advised for best results and longevity.

This pump is designed for builders who need reliable, high-volume fuel delivery without the limitations of a stock or mildly upgraded CP3.