RAM Adjustable Diesel Fuel Lift Pump 250Gph For 98.5-04 Dodge Ram 2500/3500 Cummins 5.9L FASS

FASS Fuel Systems Signature Series Adjustable Diesel Fuel Lift Pump 250GPH 1998.5-2002 Dodge Cummins 5.9L (FAS D08 250G) Part No: FAS D08 250G Our FASS Fuel Systems Signature Series Adjustable Diesel Fuel Pumps are designed to be the most versatile high performance fuel pump on the market that allows for adjustable fuel pressures to meet the demand of high performance Dodge Cummins 5.9L applications.

Manufactured with the same motor used in our Titanium Signature Series pumps, this adjustable fuel pump is rated at 250 gallons of diesel fuel per hour and offers adjustable fuel pressure from 1-75 PSI to customize fuel delivery for race or competition diesel engines. To aid in proper performance we built in a boost compensation port, air pressure from your intake manifold raises fuel pressures while under full throttle, maintaining fuel pressure when it matters most.

This kit includes a Bulkhead fitting and Suction Tube. Machined from 6061 T-6 Billet Aluminum, the Bulkhead fitting functions as both a suction tube and return and features a 5/8 inch Suction Tube along with a 1/2 inch Fuel Return Port.

This new and improved version from our previous Suction Tube allows the user to plum their FASS return line directly to their bulkhead fitting, eliminating all cutting of the filler neck, and significantly speeds up the installation process. The pickup tube is fabricated of PTFE Teflon which can be easily cut to adapt to different depth of fuel tanks. Properly installed, you can safely operate down to about 1/8 tank of fuel.

Cummins Adjustable High Performance Lift Pump Features:


Whisper Technology

Adjustable Fuel Pressure 1-75 PSI

Includes Bulkhead Fitting and Suction Tube

High Performance 250GPH

Improves Fuel Flow

Boost Compensation Port

Built In Fuel Pressure Gauge Port

All Mounting Hardware Included


This is a fuel pump only and must be used with your factory fuel filter. It is suggested that all pumps be adjusted only if you have installed a fuel pressure gauge, for questions please contact our technical support team.