Upgrade your 2021 Ram’s fuel system.



We’re excited to announce that testing of our fuel system kit for the 2021 Ram 2500 and 3500 Cummins diesel trucks is now complete! Featuring industry-leading air, water, and debris filtration, FASS Diesel Fuel Systems protect your Cummins engine and injection components from premature wear. Aside from protecting expensive components from fuel contamination, our fuel systems improve efficiency, throttle response, and horsepower potential.

Whether your 2021 Cummins is stock or making 1,500+ horsepower, we have a fuel system kit for you!

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