_1660575432__75988.original__01587.1709416922.png?c=2 "S&S DIESEL RAM-CP3-12HS 12MM HS CP3 CONVERSION KIT – COMPETITION USE ONLY – 2019–2020 RAM 2500/3500 6.7L CUMMINS 24V")
_1660575432__75988.original__01587.1709416922.png?c=2 "S&S DIESEL RAM-CP3-12HS 12MM HS CP3 CONVERSION KIT – COMPETITION USE ONLY – 2019–2020 RAM 2500/3500 6.7L CUMMINS 24V")
Product Description
S&S DIESEL RAM-CP3-12HS 12MM HS CP3 CONVERSION KIT – COMPETITION USE ONLY – 2019–2020 RAM 6.7L CUMMINS
Upgrade your 2019–2020 Ram 2500/3500 6.7L Cummins from the factory CP4.2 to a brand-new Bosch CP3NH-based 12mm High-Speed (HS) CP3 engineered by S&S Diesel Motorsport. This competition-only kit delivers reliable high-rpm fuel supply with OE-grade install hardware and a clean, factory-style fit and finish.
- Brand-new Bosch CP3NH-based 12mm HS pump (no reman core)
- Proprietary S&S drive gear & pilot pre-installed on the CP3
- High-speed overdrive design for increased fueling at rpm
- OE-quality injection-molded ECU mount
- OE-style quick-connects, braided supply line, and autofrettaged high-pressure fuel line
- Direct CP4.2-to-CP3 conversion for 2019–2020 Ram Cummins
Fitment
- 2019–2020 Ram 2500/3500
- Engine: 6.7L Cummins 24-valve
- Fuel system: CP4.2 (factory) converting to CP3 (included)
Notes: This 12mm HS kit is intended for competition/off-road use only. Custom calibration is typically required for the 12mm HS pump. Verify legality for your application and locale.
Recommended Supporting Parts (CPP Internal Links)
- Airdog II-5G Lift Pump (2019–2023 Ram Cummins) – stable low-pressure supply under load.
- FASS Titanium Signature Fuel System (2019–2020) – filtration & air separation for maximum injector life.
- 2019–2024 Ram Cummins Fuel System Category – rails, lines, sensors, fittings & more.
- Filtration Category – fuel filters & maintenance kits.
- Engine Parts (2019–2024 Ram Cummins) – head studs, gaskets, valve train for higher cylinder pressure builds.
FAQ
Does the 12mm HS CP3 require custom tuning?Yes—12mm HS conversions typically require calibration changes to properly command rail pressure and fueling. Always coordinate with your tuner.
No. This RAM-CP3-12HS configuration is labeled for competition/off-road use only. Check your local and federal regulations.
The HS variant uses an overdrive drive strategy and internal modifications optimized for high-rpm fuel delivery while maintaining reliability.
- New S&S 12mm HS CP3 (CP3NH base) with proprietary gear & pilot installed
- OE-grade ECU mount
- OE-style quick-connect fittings
- Braided low-pressure supply line
- Autofrettaged high-pressure fuel line
- Install hardware specific to 2019–2020 Ram
Strongly recommended for any high-output CP3. A quality lift pump improves supply, filtration, and injector/system longevity. See our Airdog/FASS options above.
Yes, the conversion hardware is common for 2019–2020 Ram 6.7L applications. Calibrations may differ—consult your tuner.
