Product Description
S&S Diesel CP3-CU-12-HS-SP is a 12mm High Speed CP3 (6.7L-based) paired with the SP3000 mechanical supply pump for massive, stable fuel delivery on common-rail Cummins builds. Ideal for high-RPM competition setups while retaining streetable drivability.
- Displacement: 1,590 mm3/rev (12mm)
- Supply Pump: SP3000 rated at 3,000 L/hr
- Platform: 6.7L-based CP3 body for improved durability
Fitment
2003–2018 Dodge Ram Cummins 5.9L/6.7L 24V. High-speed 12mm CP3 with SP3000 supports aggressive fueling demands at elevated RPM. Fitment year range corroborated by dealer listings for this exact part number.
What’s Included
- New S&S Diesel 12mm High Speed CP3 (6.7L-based)
- S&S SP3000 mechanical supply pump (3,000 L/hr)
Recommended Parts (CPP Internal Links Only)
- Fleece HP Fuel Line Adaptation Kit (needed when installing a 6.7L-based CP3 on 5.9L applications): FPE-CUMM-CP3-FL-ADPT-KIT.
- Fuel Rail Pressure Relief Valve (PRV) – 5.9L 2003–2007: Cummins 3947799.
- Complete 5.9L Fuel Rail (with sensor & PRV): Exergy E06 20050.
- 03–07 CP3 Pump Category (stock to race): Shop 5.9L CP3 Pumps.
- 12mm CP3 Pumps Category (browse related options): Shop 12mm CP3.
- S&S Diesel brand page (browse all S&S at CPP): S&S Diesel at CPP.
Helpful Notes
- This 12mm High Speed CP3 is 6.7L-based; 5.9L installs typically require the adaptation kit listed above (lines/fittings).
- SP3000 flows 3,000 L/hr and is designed to supply ample volume/pressure to the CP3 under sustained load and high RPM.
- Plan for matching injector size and tuning appropriate to your goals; see our categories above.
Yes. It covers 2003–2018 Cummins common-rail applications. For 5.9L installs, use the Fleece adaptation kit to mate the 6.7L-based pump to 5.9L hard lines and fittings.
FAQ: Do I need an upgraded lift/supply system if I have the SP3000?The SP3000 is the dedicated mechanical supply pump for this system, delivering up to 3,000 L/hr. It’s built to feed high-demand CP3 setups at RPM—pair with clean filtration and healthy lines for best results.
FAQ: What injector size pairs well with this pump?Injector choice depends on your goals (towing vs. competition). Reference S&S fuel system planning guidance and our injector categories; contact us for a tailored match.
FAQ: Is tuning required?Custom calibration is recommended to maximize the benefits of a high-speed 12mm CP3 and SP3000 supply system.
FAQ: What’s the difference between 12mm HS and 14mm HS?Both are high-speed optimized. The 14mm displaces ~1,850 mm3/rev vs. ~1,590 mm3/rev for 12mm, enabling greater peak fuel mass if the rest of the system supports it.
