Description
Overview
The FASS FASD08100G is a Signature Series Adjustable Diesel Fuel System engineered specifically for the 1998.5-2004 Dodge Cummins 5.9L. Built to be one of the most versatile high-performance fuel systems available, it replaces the shortcomings of a factory lift pump with a purpose-built, adjustable delivery system rated at a robust 100 gallons per hour. Whether you’re running a stock truck or a moderately built 0-600 HP setup, this kit is designed to keep clean, consistent fuel flowing to the injection system exactly when your engine demands it.
At the heart of this system is the same motor used in the premium Titanium Signature Series, giving you proven, high-performance pumping capability in an adjustable package. The design centers on customizable fuel pressure, allowing you to dial in delivery to match your build — from mild daily-driver tuning to race and competition applications.
Key Benefits
Adjustability is what sets this Cummins fuel system apart. The adjustable fuel pressure range lets you fine-tune delivery to your engine’s needs, so you can maintain proper pressure across the full RPM and load range. A built-in boost compensation port draws air pressure from your intake manifold, raising fuel pressure under full throttle to hold pressure when it matters most — during hard, high-boost pulls.
FASS Whisper Technology keeps operation quieter than you’d expect from a high-flow system, and the 100GPH capacity ensures there’s plenty of headroom to improve fuel flow as your power goals grow. A built-in fuel pressure gauge port makes it easy to monitor performance and verify your pressure settings at a glance.
Highlights
- Adjustable fuel pressure from 1-20 PSI to customize delivery for street, race, or competition use
- High-performance 100GPH capacity for stock to moderate 0-600 HP builds
- Boost compensation port raises fuel pressure under full throttle for consistent delivery
- Whisper Technology for quieter operation
- Built-in fuel pressure gauge port for easy monitoring
- Same motor used in the Titanium Signature Series Systems
- Black finish, sold as a complete kit with all mounting hardware included
Option & Configuration
This is the Adjustable Signature Series configuration (Part No. FASD08100G), designed for Stock to Moderate applications spanning 0-600 HP. It ships as a complete kit with all mounting hardware, making installation straightforward on the intended platform.
Fitment
Engineered for the 1998.5-2004 Dodge Cummins 5.9L Truck/SUV. This is a fuel system only and is intended to be used with your factory fuel components. Choose this system when you want dependable, adjustable fuel delivery tailored to your Cummins build.
