165GPH Adjustable Fuel Lift Pump

Features:

• 165 gallons per hour fuel flow
• Adjustable 1 to 75 PSI output
• Designed for 6.6L Duramax engines
• Fits 2001-2016 Silverado and Sierra HD
• Uses proven Titanium Series motor
• Boost compensated pressure control
• Maintains pressure at full throttle
• Supports race and competition builds
• Improves fuel supply to injection pump
• Helps prevent pressure drop under load
• Works with factory fuel filter
• Customizable fuel pressure for tuning

Give Your Duramax The Fuel Control It Has Been Missing

If you have ever watched fuel pressure dip when you lean into the throttle, you already know how important a solid lift pump can be. The FASS FASC09165G 165GPH Adjustable Fuel Lift Pump is built for 2001-2016 6.6L Duramax owners who want steady, reliable fuel delivery without overcomplicating their setup. With 165 gallons per hour on tap, it provides more than enough volume for mild to moderate performance builds while still being perfectly at home on a strong daily driver. What really makes this pump stand out is the adjustable pressure range from 1 to 75 PSI, giving you the ability to fine tune your fuel system to match your injectors and tuning. Additionally, the built in boost compensation port increases fuel pressure as boost rises, helping maintain consistent supply when you are under heavy load. That means smoother pulls, more stable performance, and added confidence when towing or getting into the throttle. For Silverado and Sierra 2500HD and 3500HD owners looking for dependable fueling support, this pump is a smart upgrade that delivers real world results.

Built With Proven Components For Consistent Fuel Pressure

At the core of this system is the same dependable motor used in the FASS Titanium Series pumps, giving it the durability expected in high performance diesel applications. Rated at 165 gallons per hour, it is designed to maintain steady fuel supply to your injection pump and help reduce the risk of pressure drop under load. The adjustable 1 to 75 PSI range allows precise setup, but it is strongly recommended to pair adjustments with a quality fuel pressure gauge to ensure accurate calibration. Furthermore, the integrated boost reference port connects to your intake manifold so fuel pressure rises in relation to boost, maintaining proper delivery at full throttle. This unit is a fuel pump only and is intended to work with your factory fuel filter, keeping installation straightforward and system design simple. When properly installed and adjusted, it helps create a more stable fuel environment for your Duramax, which can contribute to smoother operation and improved reliability. For performance focused 6.6L builds that need controlled and consistent fuel supply, this adjustable FASS pump offers both flexibility and proven engineering.

Fitment: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2001-2016 6.6L Duramax only
• Fuel pump only not full system
• Must retain factory fuel filter
• Fuel pressure gauge required for adjustment
• Adjust pressure carefully to avoid damage
• Boost reference connection required
• Intended for performance applications
• Proper installation critical for reliability
• Recommended for mild to moderate builds
• Technical support available from FASS