FASS Fuel Lift Pump

Why FASS Fuel Lift Pumps Stand Apart

FASS Fuel Systems — an acronym for Fuel Air Separation System — occupies a unique position in the fuel lift pump category because its products are far more than simple fuel-delivery devices. FASS lift pumps are integrated diesel fuel systems engineered to provide consistent fuel delivery, multi-stage filtration, and air/vapor separation in a single frame-mounted assembly, addressing the root causes of injector wear and premature injection pump failure in a single upgrade.

The Titanium Signature Series: The Benchmark for Diesel Lift Pumps

The flagship line in FASS's lift pump lineup is the Titanium Signature Series, widely regarded as the benchmark for reliable aftermarket fuel lift pumps for diesel engines. Flow rates are available from 95 up to 260 gallons per hour, covering every need from a stock daily driver up to an extremely modified diesel with massive fueling demands. The Titanium Signature Series is designed to fit Dodge Ram with Cummins engines, Ford with Powerstroke engines, GM trucks with Duramax engines, and Class 8 semi-trucks — making it one of the most versatile lift pump families on the market.

What truly sets the Titanium Signature Series apart are the proprietary engineering technologies FASS has developed exclusively for these pumps:

• FASS Whisper Technology (FWT): After more than two and a half years of development and testing, FASS engineered a lift pump that drastically reduces operating noise while simultaneously increasing fuel flow rates — the opposite of how competitors manage noise by simply throttling back flow.
• Performance Radius Cuts (PRC): An advanced machining technique that creates smooth, curved flow paths inside the aluminum pump housing. This prevents the reintroduction of air and vapor back into the fuel and eliminates the stagnant fuel pockets that form at sharp 90-degree bends used by lesser-quality competitors.
• Mass Flow Return (MFR) Technology: Fuel not immediately needed by the engine is returned to the tank after passing through the filtration process — continuously "polishing" the fuel, maintaining positive pressure to prevent cavitation, and guarding against galling and scoring in the injection pump.
• Patented Air/Vapor Removal: FASS's filtration reaches down to 2 microns, well beyond what factory fuel systems provide, while the built-in water separator maintains 90%+ efficiency at removing water even as flow rates increase.

Drop-In Series and Adjustable Options

Beyond the Titanium Signature Series, FASS offers the Drop-In Series, developed to achieve industry-leading filtration with the simplest possible installation — a true bolt-in upgrade that can be completed in under an hour without removing the fuel tank. For competition and high-performance applications, the FASS Adjustable Fuel Pump allows tunable fuel pressure settings and includes a boost compensation port that raises fuel pressure under full throttle to ensure consistent delivery when it matters most.

Built in the USA, Backed by a Lifetime Warranty

FASS lift pumps are proudly engineered, manufactured, and assembled in the USA, with each system rigorously tested and inspected before shipping. All Titanium Signature Series pumps for light-duty truck applications are backed by a Limited Lifetime Warranty, and the brand has achieved less than a 2% motor failure rating — a testament to the engineering discipline that goes into every unit. Whether you tow heavy, compete on the strip, or simply want to protect a high-dollar injection system, FASS offers a lift pump solution matched to your build level.