Engineered specifically for high-performance and competition 2001 through 2016 Chevrolet Silverado and GMC Sierra 2500HD/3500 trucks powered by the 6.6L Duramax V8 turbo diesel engine (LB7, LLY, LBZ, LMM, and LML platforms), the S&S Diesel Motorsport 12mm Stroker CP3 High-Pressure Pump (Part # CP3-DMX-12) provides unmatched fuel volume delivery. While stock injection pumps experience severe volume drop-off past 3,000 RPM, the S&S 12mm stroker pump is engineered to maintain high-pressure delivery efficiency well into the upper RPM range.

Built from 100% brand-new Bosch LBZ-based pump cores and outfitted with custom internal stroker components (providing 1,590 mm³/rev displacement), each pump includes an individual calibration data sheet to assist your tuner. Operating as a brand-new outright performance component requiring no core deposit, this pump delivers exceptional reliability for high-horsepower builds.

Key Features & Benefits

• Massive 1,590 mm³/rev Displacement: Outfitted with 12mm stroker plungers to support extreme fueling demands up to 1,000 horsepower in a single pump layout.
• High-RPM Fuel Efficiency: Extends efficient high-pressure fuel delivery past standard RPM drop-off points to support aggressive performance tuning.
• 100% Brand-New Bosch Core: Built upon authentic Bosch LBZ-derived pump housings for ultimate factory compatibility and durability.
• Includes Calibration Data Sheet: Each unit ships with specialized flow-rate data sheets required for precise ECM custom tuning calibration.
• Zero Core Charge: Brand-new outright high-pressure pump requiring no core deposit or core return shipping.

Technical Specifications

• Manufacturer / Brand: S&S Diesel Motorsport
• Manufacturer Part Number / SKU: CP3-DMX-12
• Product Type: High-Pressure Common Rail 12mm Stroker CP3 Injection Pump
• Pump Displacement: 1,590 mm³ / revolution
• Supported Power Output: Up to 1,000+ RWHP (Single Pump Configuration)
• Core Requirement: None
• Warranty: S&S Diesel Motorsport 2-Year Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2001–2004 GM 2500HD / 3500 Duramax 6.6L (LB7 – requires custom tuning)
• 2004.5–2005 GM 2500HD / 3500 Duramax 6.6L (LLY – requires custom tuning)
• 2006–2007 GM 2500HD / 3500 Duramax 6.6L (LBZ Classic)
• 2007.5–2010 GM 2500HD / 3500 Duramax 6.6L (LMM)
• 2011–2016 GM 2500HD / 3500 Duramax 6.6L (LML – requires CP3 conversion kit)
• Installation Tip: Due to the extreme volumetric output of the 12mm stroker plungers, an aftermarket lift pump system (150 GPH or higher) and custom ECM tuning are strictly required to ensure proper supply pressure and pump calibration.