FASS Fuel Pump Complete Kit

FASS Fuel Pump Complete Kits: Everything Your Diesel Needs in One Box

When it comes to fuel pump complete kits for diesel trucks, few names carry the weight that FASS — Fuel Air Separation Systems does. Founded by Brad Ekstam, whose passion for better fuel delivery took shape in the early 1990s and grew into a full-scale manufacturing operation, FASS has spent over two decades engineering some of the most capable lift pump systems on the market. Their complete kits aren't just pumps — they're comprehensive fuel conditioning solutions.

What Makes a FASS Complete Kit Different

A standard factory fuel pump simply moves fuel from the tank to the engine. A FASS Fuel Pump Complete Kit does considerably more. These systems are engineered to address one of diesel's most persistent enemies: air and vapor contamination in the fuel supply. As FASS explains, air and vapor in diesel can reduce horsepower, hurt fuel economy, cause hard starts, and accelerate injector wear. A FASS complete kit tackles this at the source.

Each kit integrates a high-flow lift pump with FASS's patented air and vapor removal process, multi-stage filtration, and a built-in water separator — all working together to deliver conditioned, "polished" fuel to the injection system. The result is cleaner, denser fuel arriving at consistent pressure, which is especially critical for sensitive injection pumps like the VP44 and high-pressure CP3 and CP4 systems found in modern diesel trucks.

Key Product Lines Available as Complete Kits

• Titanium Signature Series: FASS's flagship line, featuring their proprietary Whisper Technology for quieter operation, filtration down to 2–3 microns, and flow rates from 100 GPH up to 290 GPH. These kits are built to support everything from stock daily drivers to high-horsepower builds exceeding 700 HP. The Titanium Signature Series PLUS pushes filtration to 2 microns for maximum protection.
• No-Drop Series: Designed to simplify installation, No-Drop kits include a fuel sump that eliminates the need to drop the fuel tank — making them a popular choice for Dodge Ram 5.9L and 6.7L Cummins owners who want a straightforward upgrade path.
• DRP (Direct Replacement Pump) Series: Engineered for Dodge Cummins trucks, the DRP series is a complete bolt-in replacement for the factory block-mounted lift pump. It installs directly into factory mounting points and is designed to eliminate the known failure points of OEM lift pumps.
• D-MAX Series: Purpose-built for GM Duramax-powered trucks, providing a vehicle-specific solution that integrates cleanly with the factory fuel system architecture.

Built in the USA, Backed by Industry-Leading Warranties

All FASS systems are engineered, manufactured, and assembled in the United States, using high-grade billet aluminum construction and Gerotor-type pump assemblies known for exceptional longevity. FASS's complete kits are backed by industry-leading warranty coverage, and each system undergoes rigorous testing before it leaves the factory. Whether you're protecting a work truck that runs every day or feeding a modified diesel pushing serious power, a FASS Fuel Pump Complete Kit delivers the reliability and performance that serious diesel owners expect.

Browse the full selection of FASS Fuel Pump Complete Kits to find the right system for your truck, or explore the complete FASS brand catalog for filters, replacement pumps, sumps, and accessories.