Cummins 3939258 is the genuine gasket that seals the mechanical fuel transfer pump to the engine on the 5.9L 12-valve Cummins. It fits both the 1989-1993 VE-pump and 1994-1998 P-pump 12-valve trucks.

A reused or damaged gasket is a common source of leaks after lift pump work. Keep one on hand any time the pump comes off.

• Genuine Cummins: OEM gasket for a correct fit.
• Leak-Free Seal: Seals the lift pump to the engine block.
• Wide 12V Fitment: Fits 1989-1998 5.9L 12-valve engines.
• Pairs With Pump Swaps: Use with a new 4983584 or AP63478 lift pump on 1989-1993 trucks.

Technical Specifications

• Part Number: 3939258
• Type: Fuel transfer pump gasket
• Core Requirement: No core required

Vehicle Fitment & Technical Installation Notes

• Fitment: 1989-1998 Dodge Ram 250/350 and 2500/3500 with the 5.9L 12-valve Cummins
• Installation Tip: Replace this gasket any time the lift pump is removed instead of reusing the old one.