Description
Overview
The FASS Adjustable Diesel Fuel Lift Pump delivers 250 gallons per hour of clean, consistent diesel to your 2010-2014 Dodge Cummins 6.7L. Part of the FASS Fuel Systems Signature Series ADJ Fuel System line, this Super Extreme unit is engineered for the 900-1200 horsepower range and built around the same proven motor found in the Titanium Signature Series. If you’re chasing maximum, repeatable fuel delivery for a race or high-performance build, this is the versatile, tunable foundation your fuel system deserves.
What separates this adjustable diesel fuel system from a standard lift pump is control. Instead of a fixed output, you get adjustable fuel pressure from 1 to 75 PSI, letting you dial in exactly the fuel curve your engine demands. Whether you’re setting up a daily driver at moderate pressure or feeding a competition-spec Cummins hungry for volume, you customize delivery to the application rather than settling for a compromise.
Key Benefits
To keep fueling honest when the throttle is pinned, FASS engineered a built-in boost compensation port. Air pressure drawn from your intake manifold raises fuel pressure under full throttle, maintaining pressure exactly when your engine is under its heaviest load. That means no lean-out at the top of the run where big power lives.
Sold as a complete kit, this system arrives with the hardware needed to get your fuel supply routed correctly, including a Bulkhead fitting and Suction Tube. The Bulkhead fitting is machined from 6061 T-6 Billet Aluminum and finished in black, functioning as both a suction tube and return. It features a 5/8-inch Suction Tube alongside a 1/2-inch Fuel Return Port, an improved design over the previous suction tube that gives you a cleaner, more flexible way to plumb your FASS return.
- 250 GPH flow rate for high-horsepower Cummins fuel demand
- Adjustable fuel pressure from 1-75 PSI for race and competition tuning
- Super Extreme configuration rated for 900-1200 HP applications
- Built-in boost compensation port raises pressure under full throttle
- Same motor used in the FASS Titanium Signature Series
- 6061 T-6 Billet Aluminum Bulkhead fitting with 5/8″ suction and 1/2″ return
Fitment
This Signature Series Adjustable Diesel Fuel System (Part No. FASD05250G) is designed for 2010-2014 Dodge Cummins 6.7L trucks and SUVs. It ships as a complete kit, so you get the pump, Bulkhead fitting, and Suction Tube together, ready to integrate into your fuel system.
For serious diesel owners who refuse to let fuel supply become the bottleneck, the FASS ADJ 250GPH system combines high-volume capacity, precise pressure control, and durable billet construction into one tunable package built to keep your Cummins fed at any power level.
