FASS Signature Series Adjustable Diesel Fuel Pump

The Adjustable Series uses the same fuel air separation design as the Titanium Signature Series, fitted with an adjustable fuel pressure regulator. Instead of living with whatever spring FASS shipped, you set outlet pressure to suit the truck. A stock truck, a mild tune and a competition build don't all want the same supply pressure.

The two in-stock options are both 100 GPH systems, one for the 2001-2012 Duramax and one for the 1998.5-2004.5 24-valve Cummins. Per FASS, 100 GPH covers stock to 600 HP. If you're building past that, call us and we'll talk through a bigger system.

Why we like it

• The adjustable regulator lets you dial pressure for the build (per FASS)
• Same fuel air separation design as the Signature Series (per FASS)
• Water separation and filtration built into the unit
• Exact FASS part number on each option

Fitment: 2001-2012 GM 2500/3500 Duramax; 1998.5-2004.5 Dodge Ram 2500/3500 5.9L Cummins. Choose your exact application from the options; each option is a specific FASS part number.

Questions on fitment? Call the shop at (806) 503-2161.

Ships direct from a US warehouse in 1-3 business days. Most parts drop-ship directly from the manufacturer or distributor warehouse; tracking is emailed as soon as it ships.

Free shipping on qualifying orders. Free local pickup in Ropesville, TX.

Questions? Call (806) 503-2161 (Mon-Fri 8am-5pm CT) or email blackdiamondultd@gmail.com.