Engineered specifically for 2003 through 2018 Dodge Ram 2500, 3500, 4500, and 5500 trucks equipped with 5.9L and 6.7L Cummins 24-valve common-rail turbo diesel engines, the S&S Diesel Motorsport 12mm High-Pressure Stroker CP3 Injection Pump (CP3-CU-12) provides the fuel volume required for serious competition and high-output street builds. The factory Bosch CP3 begins tapering fuel delivery above 3,000 RPM, frequently causing rail pressure drain under wide-open throttle (WOT) on trucks running enlarged performance injectors, compound turbos, or aggressive race tuning.

Built 100% brand-new using the robust 6.7L Cummins Bosch CP3 architecture—not a worn remanufactured core—the CP3-CU-12 delivers an impressive 1,590 mm³/rev of displacement. Internally modified and flow-matched on precision test benches, this stroker pump sustains full rail pressure up to 4,500 RPM to safely fuel setups pushing up to 1,000 rear-wheel horsepower. Because it starts from a brand-new factory unit, there are no core returns, no downtime, and no risk of running pre-fatigued housing hardware.

Key Features & Benefits

• Massive Displacement Upgrade: Expands stroke volume to 1,590 mm³/rev, supplying over 85% more fuel volume than a standard factory 5.9L/6.7L CP3.
• Supports Up to 1,000+ Horsepower: Maintains rock-solid common-rail fuel pressure under heavy load, eliminating lean spikes and rail pressure drop at high RPMs.
• Extended High-RPM Fuel Delivery: Engineered to maintain high fuel volume all the way to 4,500 RPM, where stock pumps taper off past 3,000 RPM.
• 100% Brand-New Unit: Built using brand-new Bosch base castings and components; requires zero core charge and eliminates core return shipping.
• Proven Common-Rail Durability: Bench-tested and calibrated by S&S Diesel Motorsport engineers to ensure unmatched reliability on drag strips, sled pull tracks, and daily street driving.

Technical Specifications

• Manufacturer / Brand: S&S Diesel Motorsport
• Manufacturer Part Number / SKU: CP3-CU-12
• Alternative Internal Part Numbers: SSDCP3-CU-12 / CP3CU12
• Pump Base Architecture: Genuine Bosch 6.7L Cummins High-Pressure CP3 Platform
• Pump Stroke / Displacement: 12mm Stroker Assembly / 1,590 mm³/rev Displacement
• Horsepower Rating: Up to 1,000 HP (Application & Injector Dependent)
• Maximum Fueling RPM Range: Up to 4,500 RPM Continuous Fuel Delivery
• Truck Platform: 2003–2018 Dodge Ram 2500, 3500, 4500, 5500 Super Duty
• Engine Platform: 5.9L & 6.7L 24V Cummins Common-Rail Turbo Diesel
• Core Requirement: None
• Warranty: S&S Diesel Motorsport Manufacturer Warranty

Vehicle Fitment & Technical Installation Notes

• 2007.5–2018 Dodge Ram 2500 / 3500 / 4500 / 5500 – 6.7L Cummins 24V Common-Rail Diesel (Direct Bolt-On)
• 2003–2007 Dodge Ram 2500 / 3500 – 5.9L Cummins 24V Common-Rail Diesel (Requires Line Adaptations)
• Fits Model Years: 2003, 2004, 2004.5, 2005, 2006, 2007, 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
• 5.9L Installation Requirements: Because this unit is constructed from the superior 6.7L Bosch CP3 casting, the low-pressure supply port is situated on the side of the flange rather than the top. When retrofitting to 2003–2007 5.9L Cummins trucks, the factory supply lines must be adapted using standard high-pressure flexible fuel lines or 6.7L-style line fittings.
• Fuel Supply & Tuning Requirement: Custom ECM calibration (tuning) is required to properly scale fuel pump delivery maps and FCS control valves. An upgraded low-pressure aftermarket lift pump system rated at 150 GPH or higher (e.g., FASS or AirDog) is required to ensure positive fuel feed and prevent cavitation.