Fleece Performance PowerFlo In-Tank Lift Pump Kit (FPE-34755) – 2003-2004.5 5.9L Cummins

Upgrade your 5.9L Cummins fuel system with the only true drop-in high-performance lift pump solution. The Fleece PowerFlo (FPE-34755) is a complete fuel supply upgrade kit engineered specifically for 2003–2004.5 Dodge Ram 2500/3500 trucks with the 5.9L 24-valve Cummins. It replaces the factory in-tank lift pump with a high-flow, dual-gerotor design that supports up to 800+ RWHP (including dual CP3 setups) while maintaining factory-like integration and quiet operation.

Why Choose the Fleece PowerFlo?

Stock lift pumps on modified 5.9 Cummins engines often struggle with fuel delivery, especially at low tank levels or under high demand. External frame-mounted pumps are noisy and require extensive plumbing. The PowerFlo solves both problems with active fill bucket technology and true OEM-style in-tank mounting—no drilling, no cutting, and no sump required.

• Direct drop-in fitment — Installs in less than half the time of competing high-flow lift pump systems using factory connections and mounting points.
• Dual gerotor pumps — Two OEM-quality gerotor pumps deliver dramatically increased flow and reliability over the factory single pump.
• Silent operation — Eliminates the whine and vibration of traditional aftermarket lift pumps.
• No more quarter-tank issues — The active fill bucket design prevents fuel starvation even when the tank is low.
• Regulated return — Maintains proper pressure and eliminates over-pressure situations that can damage injectors or the CP3.
• Complete fuel system upgrade — Includes everything needed to properly route, plumb, pump, and filter fuel, plus a new fuel level sender and float so your factory gauge works accurately again.

Key Features

• Supports up to 800+ RWHP (including dual CP3 configurations)
• Operating pressure: 15–17 psi at idle
• Donaldson 3-micron fuel filter with water separator
• Retains factory water-in-fuel (WIF) sensor and fuel heater functionality
• Validated for up to B20 biodiesel
• Lifetime limited warranty on the PowerFlo lift pump

Kit Includes

• PowerFlo Lift Pump assembly with integral fuel sender
• Donaldson 3-micron fuel filter & water separator (P/N P553203)
• Filter base with integral mounting
• Fuel filter delete module (FPE-FFD-RO-3G)
• Distribution filter block / filter coupler
• Push-lock hose and all necessary AN and barb fittings

Fitment Notes (Important)

Fits 2003–2004.5 Dodge Ram 2500/3500 5.9L Cummins trucks equipped with the factory-style in-tank pump configuration (plastic locking cap).

Does NOT fit 2005+ trucks with the metal locking ring and alignment tab on the pump cap. 2004 trucks with dealer-installed in-tank retrofits are compatible.

This is the cleanest, quietest, and most reliable way to upgrade fuel delivery on a 2003–2004.5 5.9L Cummins without compromising drivability or spending hours on custom fabrication. Perfect for daily drivers, tow rigs, and high-horsepower performance builds alike.