Product Description
S&S Diesel CP3-DMX-14-HS is a brand-new, LBZ-based 14mm High Speed CP3 delivering 1,850 mm³/rev displacement for serious Duramax builds. Engineered for high RPM fueling and stability, this stroker CP3 is the go-to foundation for LB7, LLY, and LBZ platforms that need reliable, consistent rail pressure under load.
Fitment
- 2001–2004.5 GM Duramax 6.6L LB7
- 2004.5–2006 GM Duramax 6.6L LLY
- 2006–2007.5 GM Duramax 6.6L LBZ
Built on an LBZ-based Bosch pump architecture and optimized for high-speed operation to sustain rail pressure at elevated engine speeds.
What’s Included
- New S&S Diesel CP3-DMX-14-HS 14mm High Speed CP3 (LBZ-based)
- Pre-installed FCA/MPROP (LBZ-style) — ready for tuning and setup
- Bench-validated by S&S Diesel Motorsport
Recommended Parts (CPP-Only Links)
- GM DURAMAX FUEL LIFT PUMPS — add a quality lift pump to feed the CP3 under load
- FASS FASC09100G 100GPH LIFT PUMP (01–16 DURAMAX) — proven, reliable supply
- GM DURAMAX CP3 PUMPS & COMPONENTS — lines, seals, and related hard parts
- S&S CP3-DMX-14 (NON-HS) — alternative 14mm option
- S&S CP3-DMX-14-HS-SP (WITH SP3000 SUPPLY PUMP) — turnkey high-flow supply pairing
Helpful Notes
- High-speed optimized stroker CP3 is intended for performance builds; custom calibration is commonly required.
- Support the CP3 with a quality lift pump to prevent cavitation and pressure drop at WOT.
- Use clean fuel and proper filtration; verify rail relief condition and return rates during install.
FAQ
Is this pump brand new or reman?This is a new, LBZ-based S&S Diesel Motorsport CP3 (not a reman).
What displacement and behavior should I expect?The CP3-DMX-14-HS is a 14mm stroker delivering approximately 1,850 mm³/rev, optimized to maintain rail pressure at higher RPM versus stock CP3 behavior.
Do I need a lift pump with this CP3?Yes, for best results pair it with a quality lift pump (e.g., FASS 100GPH for 01–16 Duramax) to ensure adequate inlet supply under load.
Does it come with the SP3000 supply pump?No — this listing is for the CP3 only. If you want the matched high-flow supply, choose the CP3-DMX-14-HS-SP kit.
Will it fit LMM (2007.5–2010)?This HS pump is targeted at LB7/LLY/LBZ builds. For LMM/LML conversions and kits, see our CP3 categories and conversion kits.
