If you own a 2019 or newer Ram 2500 or 3500 with the 6.7L Cummins, you already know that reliability and fuel quality are everything. Modern diesel injection systems are powerful—but also sensitive to air, water, and debris in fuel. That’s where the
FASS Drop-In Series Fuel System comes in.
This system is a direct-fit, high-efficiency upgrade designed to improve performance, filtration, and long-term reliability—that drastically reduces the cost of fuel filter changes. And in the how-to installation video linked below, Albert from FASS R&D walks through exactly how easy it is to install one on your truck.
The FASS Drop-In Advantage
Unlike traditional fuel systems that require drilling, wiring, or dropping the tank, the
FASS Drop-In Series is engineered to install in just a couple of hours; while keeping the OEM in-tank fuel pump intact.
Key Benefits:
- Simple Plug-and-Play Installation – Can easily be installed in your driveway!
- Superior Filtration – Removes air, vapor, and over 99% of water while filtering down to 2 microns absolute.
- Increased Injector & Pump Life – 3x the life of expensive injection system components.
- Improved Performance – Provides smoother throttle response, restored HP, and optimized MPG*.
- OEM-Compatible Design – Works perfectly with your truck’s factory in-tank fuel pump.
Whether your Ram is stock or tuned, the Drop-In Series ensures your fuel stays clean and stable for optimal combustion and maximum efficiency.
In the video, Albert explains the process from start to finish, showing proper mounting, connections, and tips for a clean installation. Even if you’re new to diesel performance upgrades, you’ll see just how accessible the process really is.
Why Upgrade Your 6.7L Cummins with FASS?
The stock fuel system on late-model Rams does a decent job—but it’s not perfect. It doesn’t remove entrained air or vapor, and its filtration can allow contaminants that shorten injector and CP4 pump life.
By upgrading to a FASS Drop-In Series, you’ll experience:
- Restored horsepower
- Protection against costly injection pump and injector failures (we expect to see TRIPLE the injection component life)
- Optimized MPG* (*results will vary, measurable MPG gain cannot be guaranteed)
- A more responsive throttle, and consistent driving experience
- FAR less expensive fuel filter changes
- And more!
For Cummins owners who rely on their trucks for work, towing, or performance, it’s one of the smartest investments you can make.
Final Thoughts
The
FASS Drop-In Series Fuel System is engineered for simplicity, performance, and protection—all in one package. Designed specifically for 2019+ Ram 6.7L Cummins trucks, it delivers the same legendary filtration and air separation technology that has made FASS an industry leader.
To see exactly how it installs and operates, make sure to watch our official YouTube video embedded in this post. You’ll see firsthand how the Drop-In system makes upgrading your Cummins clean, efficient, and completely plug-and-play.
