S&S DIESEL CP3-DMX-12-HS-SP DURAMAX 12MM CP3 HIGH SPEED WITH SP3000 SUPPLY PUMP — 2001–2010 GM 6.6L DURAMAX LB7 / LLY / LBZ

S&S Diesel 12mm High Speed CP3 + SP3000 Supply Pump for 01–10 Duramax

Built from a brand-new LBZ-based Bosch CP3 and optimized for high engine speed, the S&S Diesel CP3-DMX-12-HS-SP delivers 1,590 mm³/rev displacement with exceptional fueling stability at RPM where other pumps nose over. This kit includes the mechanical SP3000 supply pump for rock-solid inlet pressure and volume on demanding builds.

• High Speed Optimized: Designed to maintain delivery at elevated RPM for competition and aggressive street calibrations.
• LBZ-Based New Pump: Latest-generation CP3 architecture for durability and clean control.
• SP3000 Included: Mechanical supply pump solution that replaces the small OE lift pump and feeds the CP3 with ample, consistent supply.
• 12mm Stroker: 1,590 mm³/rev displacement for serious fuel capacity on single-pump setups.
• Fully Tested: Each unit flow-verified with data sheet from S&S.

Fitment

• 2001–2004 GM 6.6L Duramax LB7
• 2004.5–2005 GM 6.6L Duramax LLY
• 2006–2007 GM 6.6L Duramax LBZ
• NOTE: Custom calibration recommended when increasing pump output. For 2001–2005 LB7/LLY, tuning is typically required when stepping up to high-output pumps.

What’s Included

• Brand-new S&S Diesel 12mm High Speed CP3 (LBZ-based)
• S&S Diesel SP3000 mechanical supply pump assembly
• Bench test/flow data sheet
• Install notes

Recommended Parts (Internal Links)

• S&S Diesel Parts & Injectors Collection
• Duramax Injectors Category
• Fuel Rail & Regulator Components (Duramax)
• High-Flow Fuel Filtration Kits (Duramax)
• S&S 12MM CP3 HIGH SPEED (No SP3000) — Alternative

Helpful Notes

• The SP3000 replaces the small OE supply pump; do not pair with aftermarket electric lift pumps intended to do the same job.
• Verify injector health and rail hardware when upping pump output to prevent return-rate induced pressure loss.
• Use high-quality filtration and clean fuel plumbing to protect the CP3.

FAQ:

For LB7 and LLY (2001–2005), increased pump output generally requires custom calibration. Even on LBZ, tuning is recommended to fully utilize additional fuel while maintaining rail control.

No. The SP3000 is a high-capacity mechanical supply pump that replaces the small factory unit. Do not stack an electric lift pump engineered for the same function.

That depends on goals. Many street/strip builds match this pump with modest nozzle upgrades and proper tuning; competition builds may step up further. See our Duramax Injectors category for options and call CPP for sizing guidance.

Internal modifications are aimed at maintaining delivery at elevated RPM where standard pumps taper off, improving top-end fueling stability for aggressive calibrations.

This is a brand-new LBZ-based Bosch CP3 that S&S modifies and validates — not a reman.