The Perfect Balance of Flow and Protection

At 165 gallons per hour, this FASS system delivers more than enough fuel flow for stock, mildly modified, or heavily modified 6.7 Cummins trucks, while still maintaining exceptional filtration and air separation performance.

In fact, a 165GPH FASS Fuel System can support 900-1,000 wheel horsepower on the 6.7 Cummins. But, even if your truck is bone-stock; a 165GPH is an awesome upgrade; especially if you have performance upgrades planned down the road.

FASS systems aren’t just about fueling power—they’re about fueling clean. Each 165GPH System filters fuel down to 2 microns absolute, removes over 99% of water, and separates harmful air and vapor before fuel ever reaches the injectors or high-pressure pump.

The result?

• Longer injector and CP3/CP4 pump life (3x life is expected)
• Restored horsepower
• Optimized MPG (results will vary)
• Smoother throttle response
• Consistent fuel delivery under the most demanding conditions
  
  

It’s the perfect upgrade for drivers who want both power and peace of mind.

Designed Specifically for 6.7L Cummins Applications

The 6.7 Cummins is one of the most capable diesel engines on the market—but it also relies heavily on fuel quality. Air, water, and poor filtration are the leading causes of premature injector and pump failure in these trucks.

That’s where the FASS 165GPH system shines. By removing air from the fuel supply and maintaining positive fuel pressure, it prevents cavitation and starvation—two common issues in stock systems. This means better starts, cleaner combustion, and protection from expensive failures down the road.

Available in Multiple Versions: A FASS for Every Setup

Not every Cummins owner uses their truck the same way, which is why FASS offers several versions of the 165GPH system to fit virtually any 6.7L setup.

• No-Drop Series – The original design that lets you install the system without dropping the fuel tank. Includes the FASS Single-Bolt Fuel Sump for easy installation, steady fuel pickup, and consistent pressure.

• PLUS Series – Upgraded with premium fittings, improved hardware, and durable black fuel lines. Built for trucks that demand both performance and long-term reliability.

• No-Drop PLUS Series – Combines the best of both worlds: the simplified No-Drop installation and the upgraded components of the PLUS system. It’s the most popular option for 6.7 Cummins owners who want easy installation and premium performance.

No matter which version you choose, you’re getting the same legendary FASS filtration, air/vapor removal, and quiet pump operation that diesel owners have trusted for decades.

The Go-To Choice for Every Type of Cummins Owner

The 165GPH FASS system has become a staple in the Cummins community because it fits every use case:

• Daily Drivers – Enjoy smoother performance, easier starts, and longer injector life.
• Tow Rigs – Maintain consistent fuel pressure under heavy load or long hauls.
• Performance Builds – Feed enough clean fuel for high-horsepower tuning or aftermarket injectors.
• Work Trucks – Keep uptime high and maintenance costs low with reliable filtration and flow.
  
  

Whether you’re towing cross-country, running hard on the dyno, or just driving to work every day, the 165GPH system provides the perfect balance of flow, filtration, and protection.

Final Thoughts

The FASS 165GPH Fuel System for the 6.7L Cummins delivers everything diesel owners want—exceptional fuel quality, reliable flow, and proven protection for the heart of their engine. With multiple configurations available, including No-Drop, PLUS, and No-Drop PLUS, there’s a 165GPH system built to match your exact setup.

That’s why so many Cummins owners call the 165GPH FASS the ultimate “set-it-and-forget-it” fuel system. It’s powerful, dependable, and built to keep your diesel running clean for the long haul.