Engineered specifically for 2003 through 2007 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L 24-valve common-rail Cummins turbo diesel engine, the Fleece Performance High-Pressure Fuel Line Adaptation Kit (FPE-CUMM-CP3-FL-ADPT-KIT) provides a straightforward hardware solution for swapping a 6.7L-based CP3 pump onto a 5.9L engine block. Compared to factory 5.9L CP3 pumps, genuine Bosch 6.7L Cummins CP3 pumps offer larger displacement, higher flow capability, and a reinforced pump shaft design. However, because the 6.7L pump casting repositions the high-pressure discharge and low-pressure supply ports to the side of the mounting flange rather than the top, a 6.7L pump cannot bolt directly to factory 5.9L lines without custom fabrication.

The Fleece adaptation kit eliminates the need for improvised line-bending, flared adapters, or cut lines. It features a custom CNC-bent, autofrettaged high-pressure steel fuel line precision-formed to bridge the 6.7L side-discharge port directly into the factory 5.9L common-rail inlet. In addition, the kit includes high-flow feed and return fittings, diesel-rated flexible fuel hose, and constant-tension hose clamps to route the low-pressure supply circuit cleanly. Whether converting to a stock 6.7L replacement CP3 or upgrading to an aftermarket 10mm or 12mm stroker pump built on a 6.7L casting, this kit provides a direct bolt-on installation.

Key Features & Benefits

• Direct 5.9L-to-6.7L CP3 Conversion: Bridges the dimensional and plumbing differences between the 5.9L common rail and 6.7L CP3 side-port architecture.
• Pre-Bent High-Pressure Steel Line: CNC-formed and autofrettaged for exact port-to-port alignment, eliminating fatigue cracks and vibration failures.
• High-Flow Fuel Supply & Return Fittings: Includes precision-machined barb fittings designed to maximize low-pressure volume to the internal gear pump.
• Unlocks 6.7L Platform Advantages: Allows 5.9L owners to run higher-volume stock 6.7L pumps, 10mm PowerFlo 750 strokers, or large-displacement competition units.
• Complete Turnkey Hardware Package: Ships with everything needed to plumb the high-pressure and low-pressure circuits without sourcing extra fittings.
• Zero Core Charge: Brand-new outright hardware kit with no core charge and no core return required.

Technical Specifications

• Manufacturer / Brand: Fleece Performance Engineering
• Manufacturer Part Number / SKU: FPE-CUMM-CP3-FL-ADPT-KIT
• Alternative Part Numbers: FLE-S0489 / FPE-CUMM-CP3-FL-ADPT / FPES0489
• UPC: 670875719125
• Product Type: High-Pressure & Low-Pressure CP3 Conversion Plumbing Kit
• High-Pressure Line Construction: CNC Pre-Bent Seamless High-Pressure Steel Tubing
• Kit Contents:
  • (1) Pre-Bent High-Pressure CP3-to-Fuel Rail Steel Hard Line
  • (1) High-Flow Low-Pressure Feed Fitting
  • (1) High-Flow Fuel Return Fitting
  • (1) Section of Diesel-Grade Low-Pressure Fuel Hose
  • (2) Constant-Tension Fuel Hose Clamps
• Truck Platform: 2003–2007 Dodge Ram 2500 & 3500
• Engine Platform: 5.9L 24V Cummins Common-Rail Turbo Diesel
• Pump Compatibility: 2007.5–2018 6.7L Cummins Bosch CP3 Pumps (Stock, Modified, or Stroker)
• Core Requirement: None
• Warranty: Fleece Performance Engineering Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2003–2007 Dodge Ram 2500 – 5.9L Cummins 24V Common-Rail Diesel
• 2003–2007 Dodge Ram 3500 – 5.9L Cummins 24V Common-Rail Diesel
• Fits Model Years: 2003, 2004, 2004.5, 2005, 2006, 2007
• Required Pump Pairing: Must be used when installing a 2007.5–2018 6.7L Cummins-based CP3 pump (such as Fleece PowerFlo 750, S&S CP3-CU-10, S&S SuperSport CP3-CU-SS, or BD R900) onto a factory 5.9L engine block.
• Installation Tip: Hand-thread both fittings on the high-pressure steel line into the CP3 discharge port and the fuel rail inlet port before tightening either end to ensure proper seating of the flare faces. Torque the high-pressure fuel line nuts to factory Cummins specifications (22 ft-lbs / 30 Nm). Inspect low-pressure hose routing to ensure clearance against the engine oil dipstick tube and front accessory belt.