Product Description
S&S Diesel CP3-DMX-14 (NEW) is an LBZ-based 14mm CP3 fuel pump engineered for 2001–2010 GM Duramax 6.6L LB7 / LLY / LBZ applications. With an industry-proven 1,850 mm³/rev displacement, it unlocks the fueling headroom serious street/strip and competition builds demand—all with S&S Diesel Motorsport quality and OE-level precision. (LBZ-based architecture).
- Brand-new LBZ-based CP3 housing—no worn cores.
- 14mm stroker design (~1,850 mm³/rev) for major flow increase over stock.
- Direct bolt-in for LB7/LLY/LBZ fuel system architecture (tuning and supporting mods recommended for large injector/nozzle combos).
- Built and calibrated by S&S Diesel Motorsport.
Fitment
2001–2010 GM Duramax 6.6L LB7 / LLY / LBZ (Silverado/Sierra 2500HD/3500HD).
What’s Included
- S&S Diesel CP3-DMX-14 14mm CP3 pump (new, LBZ-based).
- Unit is pump-only; transfer existing ancillary hardware as required (installer’s discretion).
Recommended Supporting Parts
- GM DURAMAX CP3 PUMPS & COMPONENTS (Category)
- Shop All S&S Diesel @ CPP (Brand Hub)
- S&S LB7 80% Over Injector Set
- S&S LB7 400% Over Injector Set
- Duramax Fuel Filtration & Filter Upgrade Options
- Want more rpm capability or bundled supply? Consider the CP3-DMX-14-HS-SP (High Speed + SP3000).
Helpful Notes
- Custom ECM calibration is recommended when pairing with large injectors or aggressive nozzle sizes.
- Lift-pump/supply upgrades and excellent filtration help maximize CP3 life under high demand.
A 14mm CP3 (≈1,850 mm³/rev) is commonly paired with large injectors and tuning for high-horsepower single-pump builds; final power depends on turbo(s), injector size, fuel quality, and calibration.
Is this pump compatible with LMM?
This listing targets LB7/LLY/LBZ (2001–2010) per CPP’s fitment. Some retailers also use LBZ-based pumps on LMM platforms—confirm hardware and tuning for LMM if applicable to your build.
Do I need tuning?
Yes—bigger displacement requires proper ECM calibration for rail pressure control, injector quantity, and drivability, especially with oversized injectors/nozzles.
What’s the displacement of the CP3-DMX-14?
Approximately 1,850 mm³ per revolution (14mm stroker), per CPP listing and S&S 14mm CP3 references. CPP listing.
