Sale

Air and Fuel Fuel Pumps, Regulators and Components

FASS

Adjustable Fuel Pump 1-20 PSI, 100 GPH

$788.42 $549.00 Save $239.42

SKU: FAS D08 100G

In Stock
In Stock
Ships by Aug 2
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The FASS Fuel Systems Signature Series Adjustable Diesel Fuel Lift Pump is engineered to be a versatile, high-performance fuel pump for Dodge Cummins 5.9L engines from 1998.5 to 2004. This pump allows for adjustable fuel pressures, ranging from 1 to 20 PSI, enabling customization for race or competition diesel engines. Manufactured using the same motor found in FASS Titanium Signature Series pumps, this adjustable fuel pump boasts a flow rate of 100 gallons of diesel fuel per hour. It features a boost compensation port that increases fuel pressure under full throttle by utilizing intake manifold air pressure, ensuring consistent fuel delivery when it is most critical. Additionally, it includes a built-in fuel pressure gauge port for easy monitoring. Key features of this Cummins Adjustable High Performance Lift Pump include Whisper Technology for quieter operation, adjustable fuel pressure (1-20 PSI), a high-performance 100GPH flow rate, and improved fuel flow. All necessary mounting hardware is included for installation.

MIA's Description

The FASS Adjustable Fuel Pump is a high-performance diesel fuel lift pump designed for 1998.5-2004 Dodge Cummins 5.9L applications. It offers adjustable fuel pressure from 1-20 PSI to meet the demands of race or competition engines. This pump is manufactured with the same motor used in FASS Titanium Signature Series pumps and is rated at 100 gallons of diesel fuel per hour.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandFASS
Part NumberFAS D08 100G
CategoryAir and Fuel

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy