RAM Adjustable Diesel Fuel Lift Pump 100Gph 98.5-04 RAM 2500/3500 Cummins 5.9L FASS

FASS Fuel Systems Signature Series Adjustable Diesel Fuel Lift Pump 100GPH 1998.5-2004 Dodge Cummins 5.9L (FAS D08 100G) Part No: FAS D08 100G 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 100 gallons of diesel fuel per hour and offers adjustable fuel pressure from 1-20 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.

Cummins Adjustable High Performance Lift Pump Features:


Whisper Technology

Adjustable Fuel Pressure 1-20 PSI

High Performance 100GPH

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.