FLEECE FPE-CUMM-CP3K-5.9 5.9L CUMMINS CP3K

The FLEECE FPE-CUMM-CP3K-5.9 is the ultimate upgraded CP3 pump for 2003–2007 5.9L Cummins owners who want more fuel delivery without sacrificing OEM reliability. Engineered to support elevated horsepower levels, clean tuning, and heavy-duty towing, the CP3K delivers increased output while maintaining the quiet operation and drivability of a stock pump. Fleece CP3K, Fleece Cummins CP3 pump, 5.9L CP3K upgrade, high flow CP3 pump, diesel fuel system upgrade, CPP Diesel Fleece CP3K

Why Choose the Fleece CP3K?

• Increased fuel output for higher HP capability
• Maintains OEM drivability, throttle response, and reliability
• Direct replacement — no tuning required for installation
• Supports larger injectors and turbo upgrades
• Built and tested by Fleece Performance Engineering

Fitment

Engine: 5.9L Cummins
Model Years: 2003–2007 Dodge Ram 2500/3500
Fuel System: Factory CP3 applications (no CP4 conversions required)
Notes: Ideal for performance builds, towing upgrades, and injector/turbo combinations requiring additional fuel volume.

Cross-Reference / Related Fleece Items (CPP Diesel)

• FLEECE FPE-CUMM-CP3-10MM-5.9 (10MM Stroker CP3)
• FLEECE FPE-CUMM-CP3K-6.7 (6.7L Cummins CP3K)
• FLEECE FPE-CP3-FEED (Feed Line Connector)
• FLEECE FPE-CP3-RTRN (Return Line Connector)

On most 5.9L setups, the CP3K comfortably supports 600–650 RWHP depending on injector size and turbo configuration.

No. The CP3K is designed to work with factory tuning, though custom tuning can help maximize performance.

The CP3K is built and calibrated using new high-quality components to achieve Fleece’s output specifications.

The CP3K increases volume, not commanded pressure. It provides more fuel when the system requests it, ideal for higher HP builds.

This product includes a Proposition 65 warning; see table below.

Specifications for FLEECE FPE-CUMM-CP3K-5.9