FASS: A Fuel Filtration System First, Performance Upgrade Second

Many people assume a FASS Fuel System is only for high-horsepower builds—but at its core, it’s an advanced fuel filtration and air/vapor separation system. Every diesel engine depends on clean, air-free fuel to perform efficiently, and modern high-pressure injection systems are especially sensitive to contamination.

Here’s what FASS does better than your factory system:

• Removes Air and Vapor: Eliminates aeration and vapor pockets that cause inconsistent fuel pressure, rough idle, and premature injector wear.
• Simply installing a FASS Fuel System can TRIPLE the life of your injection system.
• Removes Over 99% of Water: Protects injection pumps and injectors from corrosion and fuel system failure.
• Filters Down to 2 Microns: Captures microscopic debris that OEM filters often miss.
• Maintains Consistent Fuel Pressure: Reduces strain on the injection pump, especially under load or heavy towing.
  
  

So while FASS systems are known for supporting 800-plus horsepower race trucks, their primary mission is reliability and protection—something every diesel owner needs.

Why Stock Trucks Still Benefit

Even brand-new factory trucks have limitations in their stock fuel delivery systems. OEM designs rely on the injection pump to pull fuel from the tank rather than push it, creating negative pressure that introduces air into the fuel line.

Over time, that air contributes to cavitation, injector damage, and hard starting—especially as mileage increases.

A FASS Diesel Fuel System adds a dedicated lift pump that pushes clean, pressurized fuel forward. This reduces the workload on your factory injection pump and helps maintain consistent fuel pressure even under heavy throttle or towing conditions.

Results our customers notice immediately:

1. Optimized MPG (results will vary)
2. Smoother idle
3. Restored horsepower
4. Easier starts in all weather
5. Sharper throttle response
6. Extended (3x is expected) injector and pump life
   
   

For most stock trucks, those benefits alone justify the investment—even before you consider performance gains.

Everyday Reliability — Not Just Competition Performance

While FASS has earned its reputation in the racing and performance community, the same engineering that supports 1,000-horsepower builds also protects everyday trucks.

FASS systems are used on:

• Work and Farm Trucks that log long hours in dusty or dirty environments
• Fleet and Service Vehicles where downtime costs money
• Towing and Hauling Trucks that need consistent power under heavy load
• Daily Drivers and Stock Pickups where longevity and fuel economy matter most
  
  

Whether your truck is a bone-stock daily driver or a built competition rig, clean fuel is the foundation of reliability—and that’s exactly what FASS delivers.

Anything That Runs on Diesel Can Benefit from FASS

FASS systems aren’t just for pickup trucks. The same technology that protects your Cummins, Duramax, or Powerstroke can also be applied to:

• Agricultural equipment
• Construction machinery
• Industrial engines and generators
• Medium- and heavy-duty commercial trucks
  
  

If it burns diesel, it benefits from a FASS.

The Bottom Line

So—does your stock diesel truck need a FASS Fuel System? Absolutely.

You don’t need to be a racer or sled puller to experience the benefits. A FASS Fuel System is first and foremost a fuel filtration and reliability upgrade, designed to deliver clean, air-free diesel to your engine under every condition.

Whether you’re working, towing, or just commuting, installing a FASS protects your investment, improves performance, and keeps your truck running stronger—mile after mile.