Product Description
S&S DIESEL L5P-CP3-10 CP3 CONVERSION KIT W/ 10MM PUMP – COMPETITION USE ONLY
Replace the factory HP4 pump on your L5P with a proven Bosch-based CP3. The S&S Diesel Motorsport® L5P-CP3-10 kit delivers consistent high-pressure fueling for competition builds, pairing a 10mm stroker CP3 with model-specific hardware for a clean, reliable install. Competition use only. Custom calibration is required.
Fitment
- 2017–2023 Chevrolet Silverado 2500HD/3500HD – 6.6L Duramax L5P
- 2017–2023 GMC Sierra 2500HD/3500HD – 6.6L Duramax L5P
What’s Included
- New S&S 10mm CP3 high-pressure pump (L5P application)
- Vehicle-specific mounting/adapter hardware and bracketry
- High-pressure hard lines from CP3 to factory fuel rails
- Feed/return fittings and required install hardware
- Documentation and data sheet for proper calibration
Recommended Parts
- FASS low-pressure lift pump (Duramax L5P) – CP3-compatible supply
- AirDog low-pressure lift pump – CP3-compatible supply
- GM Duramax L5P category – supporting fuel system & sensors
- Duramax CP3 pumps & components – lines, fittings, service parts
Helpful Notes
- Competition use only: Custom tuning is required to run a CP3 on L5P. Not for use on public highways.
- Lift pump required: Use a CP3-compatible low-pressure system. The factory in-tank L5P supply is not suitable for CP3 conversions.
- Power capacity: The 10mm CP3 variant is typically used up to ~800 rwhp in well-matched builds; select injectors/turbo accordingly.
FAQ
Does this kit include the CP3 pump?Yes — this “L5P-CP3-10” kit includes an S&S 10mm CP3 pump plus model-specific hardware and lines.
Is tuning required for an L5P CP3 conversion?Yes. L5P ECUs must be calibrated for CP3 operation. Work with a competent tuner familiar with L5P competition setups.
Do I need a lift pump?Yes. Use a CP3-compatible low-pressure lift pump (e.g., FASS or AirDog) to supply 15–20 PSI as specified by your tuner and build.
Is this emissions compliant?No. This is a competition-use-only kit and is not legal for sale or use on pollution-controlled vehicles on public roads.
How much power will the 10mm CP3 support?As a general guideline, the 10mm pump is commonly used in builds up to ~800 rwhp with appropriate injectors, turbo, and tuning.
