Bolt-In Fuel Filter Upgrades for ’03-’24 Rams
Jake H • May 22, 2024

If you’re looking for the best fuel filtration, Drop-In Series Fuel Systems are unmatched. Verified by 3rd party testing, FASS Filtration provides:


  • Over 99% Water Removal
  • Air and Vapor Separation
  • Debris Filtration Down to 2 Microns Absolute
  • Comprehensive Fuel System Protection in the Presence of Heavily Contaminated Fuel


So, you might ask, what does that actually mean? Taking fuel filtration to such extremes has many benefits, including but not limited to:


  • 3x Injection System Life
  • Restored Horsepower
  • Optimized MPG (results will vary)
  • Sharper Throttle Response
  • Reduced Soot/Smoke Output
  • And More!

Proudly Made in the U.S.A


Our Drop-In Series Fuel Systems for 2003-2023 Ram 2500/3500s with the 5.9 or 6.7 Cummins are designed, tested, and built in Marthasville, Missouri.


A family-owned company since day one, our team here at FASS Diesel Fuel Systems strives to provide the leading diesel filtration solutions on the market.


From pickups to commercial trucks and more—there’s no diesel-powered vehicle we can’t fuel.

Have questions about a FASS Fuel System for your truck? Contact us today!

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By Jake H December 8, 2025
What is a FASS No-Drop Kit? It’s a FASS Diesel Fuel System that includes a Fuel Sump for quick installation and consistent fuel delivery—no tank drop required.
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By Jake H December 5, 2025
Upgrade to FASS and enjoy 3× injector life, smoother performance, and unmatched 2-micron filtration for your class 8 truck, pickup, or diesel-powered equipment!