Engineered specifically for 2006 through 2010 Chevrolet Silverado and GMC Sierra 2500HD/3500 trucks powered by the 6.6L Duramax V8 turbo diesel engine (LBZ and LMM codes), the Industrial Injection Stage 1 CP3 "Bag of Parts" (Part # 438403) contains the specialized internal components required to modify and upgrade a stock Bosch CP3 injection pump. Enthusiasts seeking increased fuel delivery volume to support custom tuning and aftermarket turbo upgrades without purchasing an entirely new high-pressure pump can rebuild their stock unit with these matched internal parts.

The stage-1 kit optimizes internal pump flow dynamics, allowing the factory housing to sustain higher rail pressure and increased fuel volume across the upper RPM range. Manufactured to rigorous industrial standards, this kit provides a cost-effective performance overhaul with zero core charge (serviced using your existing pump core).

Key Features & Benefits

• Stage-1 Volumetric Upgrade: Modifies stock CP3 internal pump mechanics to increase overall fuel delivery volume and support performance tuning.
• Sustains High-RPM Rail Pressure: Eliminates the natural volume drop-off experienced by stock pumps under heavy load and high RPM.
• Cost-Effective Alternative: Rebuilds your existing factory pump housing into a high-performance unit, saving money over a complete replacement pump.
• Matched Internal Components: Engineered to work seamlessly within factory Bosch CP3 pump cavities.
• Zero Core Charge: Outright purchase performance component requiring no core deposit or core return shipping prior to assembly.

Technical Specifications

• Manufacturer / Brand: Industrial Injection
• Manufacturer Part Number / SKU: 438403
• Product Type: CP3 Injection Pump Internal Modification Kit ("Bag of Parts")
• Performance Tier: Stage 1 (Matched for mild to moderate tuning enhancements)
• Truck Compatibility: 2006–2010 GM 2500HD / 3500 Silverado & Sierra
• Engine Platform: 6.6L Duramax V8 Turbo Diesel (LBZ & LMM Codes)
• Core Requirement: None
• Warranty: Industrial Injection Limited 1-Year Warranty

Vehicle Fitment & Technical Installation Notes

• 2006–2007 Chevrolet Silverado / GMC Sierra 2500HD / 3500 (LBZ Classic) – 6.6L Duramax Diesel
• 2007.5–2010 Chevrolet Silverado / GMC Sierra 2500HD / 3500 (LMM) – 6.6L Duramax Diesel
• Fits Model Years: 2006, 2007, 2008, 2009, 2010
• Installation Tip: This kit requires complete disassembly of a core Bosch CP3 injection pump in a clean, contamination-free environment. Professional technician assembly and pump bench testing are strongly recommended to ensure proper internal calibration and prevent pump failure.