Description
Overview
The FASS FASC09100G Adjustable Diesel Fuel Lift Pump is part of the FASS Signature Series ADJ Fuel System line, engineered to be one of the most versatile high performance fuel systems available for the GM Duramax 6.6L. Built around the same proven motor found in the FASS Titanium Signature Series, this adjustable fuel system is rated at a robust 100 gallons per hour (100GPH) and is designed for stock to moderate applications spanning 0-600 HP. Machined from durable 6061 T-6 billet aluminum and finished in black, it’s built to deliver clean, consistent diesel fuel for years of dependable service.
Adjustable Fuel Delivery You Control
What sets this system apart is its adjustability. While it operates in the everyday 8-10 PSI range, the FASS Signature Series lets you dial in fuel pressure anywhere from 1-20 PSI, so you can customize fuel delivery to match the demands of your build — whether you’re running a daily-driven Duramax or a race and competition engine that needs precise, tuned fuel pressure. A built-in boost compensation port routes air pressure from your intake manifold to raise fuel pressure under full throttle, maintaining critical fuel delivery exactly when your engine is working hardest.
Key Highlights
- New Whisper Technology for quieter operation
- Adjustable fuel pressure from 1-20 PSI
- High performance 100GPH flow capacity
- Improves fuel flow to support performance builds
- Boost compensation port for pressure under full throttle
- Built-in fuel pressure gauge port for easy monitoring
- Constructed from 6061 T-6 billet aluminum in a black finish
- All mounting hardware included
Why Upgrade
Upgrading your Duramax to the FASS Signature Series Adjustable Fuel System means better fuel flow, quieter performance thanks to Whisper Technology, and the ability to fine-tune pressure for your specific setup. The integrated boost compensation and gauge ports give you both automatic pressure management and simple monitoring, while the billet aluminum construction ensures long-term durability. Sold as a complete kit with all mounting hardware included, it’s built to integrate cleanly into your truck.
Fitment
The FASC09100G is engineered specifically for the 2001-2016 GM Duramax 6.6L, covering both truck and SUV applications. Choose this adjustable configuration when you want the flexibility to tune fuel pressure across a wide range for stock, performance, or competition use.
Important Note
This is a fuel system only and must be used with your factory fuel filter. With adjustable pressure, high 100GPH capacity, and boost-referenced fuel delivery, the FASS Signature Series gives Duramax owners the control and reliability needed to keep fuel supply ahead of the engine’s demands.
