CUMMINS 3918880 OEM FUEL SUPPLY TUBE (LIFT PUMP TO FILTER) – RAM 5.9L 12V (1994–1998)

Product Description

The Cummins 3918880 OEM Fuel Supply Tube connects the mechanical lift pump to the fuel filter housing on 1994–1998 Dodge Ram 2500/3500 trucks equipped with the 5.9L 12-Valve Cummins. This rigid OEM tube is engineered to deliver consistent fuel flow without leaks, vibration fatigue, or pressure loss—problems commonly found in aftermarket or rubber substitute lines. If your factory line is cracked, corroded, or leaking, the 3918880 supply tube restores OEM reliability, proper sealing, and clean fuel delivery to the P-pump (P7100).

Avoid fuel starvation, aeration, and hard-starting issues by replacing worn or damaged tubing with genuine Cummins hardware designed for long service life in harsh diesel environments.

Fitment

• 1994–1998 Dodge Ram 2500/3500 with 5.9L 12-Valve Cummins (P7100 pump)
• Lift pump → Fuel filter housing supply connection
• 5.9L 6BT B-Series fuel systems using factory mechanical lift pump

Cross-Reference (Cummins-Only)

Related genuine Cummins fuel system components:

• Cummins 3903924 OEM Timing Pin – 12-Valve
• Cummins 3900267 OEM Tappet Cover Bolt Grommet Seal
• Cummins 3904409 OEM Valve Stem Guide – 51.75mm (12V)

FAQ

Is this the correct hard fuel line from the lift pump to the fuel filter housing?

Yes. Cummins 3918880 is the exact OEM supply tube for 1994–1998 12-Valve trucks with the mechanical lift pump.

Can I replace this steel tube with rubber fuel hose?

No. Rubber hose can collapse under suction, cause aeration, leak, or degrade from diesel exposure. The OEM steel tube is the correct component.

Does this fit 24-Valve VP44 trucks?

No. VP44 trucks (1998.5–2002) use a different fuel plumbing layout. This tube is for 12-Valve P-pump applications only.

Do I need new sealing washers or fittings?

Inspect existing fittings for wear. Replace if pitted or damaged. This tube installs using OEM flare-style connections, not banjo washers.

Specifications for cummins 3918880