When it comes to maximizing the reliability, performance, and efficiency of your 2019–2024 Ram 2500 or 3500 with the 6.7L Cummins engine, few upgrades are as effective—or as smart—as installing a FASS Diesel Fuel System .
Whether you use your truck for towing, daily driving, or high-performance applications, FASS delivers clean fuel, smoother operation, and confidence that your injection system is protected.
Here’s why this upgrade makes sense for nearly every Cummins owner.
1. Cleaner Fuel = Longer Injection System Life
Modern diesel fuel systems are more precise than ever—which means they’re also more vulnerable to contamination.
Factory fuel systems on the 6.7L Cummins can allow water, dirt, and air/vapor into your injection system. That can lead to premature injector wear, loss of power and fuel efficiency, rough idle, and eventually, premature failure of the injection pump or injectors.
FASS Fuel Systems remove:
- 99%+ of water
through advanced water separation
- Air and vapor
that cause injector damage and poor fuel atomization
- Particulates down to 2 microns
, keeping your system cleaner than the OEM filter setup
The result? More complete combustion, fewer injector issues, restored power, optimized MPG, and more peace of mind on every drive.
2. Improved Towing, Throttle Response, and MPG
If you tow heavy, drive long distances, or just want a truck that responds better under load, a FASS Fuel System is a worthwhile upgrade.
By maintaining consistent fuel pressure and eliminating air in the fuel, your engine receives a denser, cleaner fuel charge. This leads to:
- Better throttle response
- More efficient combustion
- Improved MPG
in many cases, especially under load
- Reduced fuel-related performance drop-offs
Whether you’re towing a fifth-wheel or running unloaded on the highway, you’ll feel the difference.
3. Easy Installation Options
FASS offers two main systems for 2019–2024 6.7 Cummins trucks, depending on your performance goals and budget:
Drop-In Series (DIFSRAM4001)
- Mounts directly in the factory water-separator location
- Retains the OEM in-tank pump
- No cutting, splicing, or complicated install
- Provides full water/air/particle filtration
- Ideal for stock or lightly modified trucks
This is the perfect plug-and-play solution for daily drivers and mild builds looking for reliability and better filtration.
Titanium Signature Series (100–290 GPH)
- Full external lift pump and filtration system
- Increased flow for tuned or high-horsepower builds
- Available in Standard and No-Drop (Includes Fuel Sump Kit) Variations, as well as with our without PLUS option (includes black ORB Fittings and Black Fuel Line)
- Backed by a limited lifetime warranty
- Absolute best-in-class fuel quality and delivery
If you’re planning to keep your Ram for multiple years, add performance modifications, and/or simply want a bulletproof Fuel System for towing or racing, this is the system for you .
4. Proven, American-Made Reliability
FASS stands for Fuel Air Separation System —and the company is known for engineering fuel systems that hold up in the real world. Built in the USA and backed by a limited lifetime warranty , every unit is designed to withstand harsh conditions and extreme demands.
Whether you’re:
- Logging miles across the country
- Hauling 20,000 lbs through the mountains
- Or just trying to avoid thousands of $$$$ in premature repairs
FASS is a name you can trust.
Final Thoughts: Is a fuel system upgrade worth It?
Absolutely.
Whether your Ram is used as a daily driver or hauling trailers around the country, the benefits of installing a FASS Diesel Fuel System on your 2019–2024 Ram 6.7 Cummins are clear:
- Cleaner fuel = longer injection system life
- Improved efficiency = Optimized MPG (results will vary)
- More power = better performance
- Less risk = more peace of mind
For under a thousand bucks, you’re protecting your $10K+ fuel system and maximizing MPG, horsepower, and reliability all at once.
The post The BEST Fuel Filter for your 6.7L Cummins (2019-2024) first appeared on FASS Diesel Fuel Systems | In God We Trust.
