2019-2023 Cummins Drop-In Series Diesel Fuel System (DIFSRAM4001)

Fits 

With the FASS Drop-In Series Diesel Fuel System, your Cummins will be protected from fuel contamination. FASS engineered this filtration solution with a lifetime warranty, making it the most effective choice for your Cummins.

Protect your Cummins injection system with the 2019-2023 Drop-In Series Diesel Fuel System! Don't let excessive wear and costly repairs be a problem - this system removes 99% of water, entrained air, and debris down to 2 Microns. Keep your diesel fuel filtered to keep your engine running smoothly. By eliminating the contaminants this Drop-In Series System for the Cummins optimizes MPG (results will vary), restores horsepower, and sharpens throttle response.

This is a true plug-and-play system, requiring no cutting, wiring, or additional modifications. This system can be installed in an hour or less!

The industry-leading water elimination skills (backed by 3rd party proof of 99% success) are enhanced by the distinctive design of the Extreme Water Separator (XWS). If the XWS becomes full, it turns into a barrier, stopping your truck and safeguarding your fuel system from severe damage.

Part Number: DIFSRAM4001

• The only drop-in Cummins filtration system that retains full functionality of the water-in-fuel sensor!
• The only drop-in Cummins filtration system with air separation!
• Increases lubricity of the fuel by up to 10% by removing entrained air and air vapor.
• Extends the life of fuel injection system components.
• Over 99% free and emulsified water separation with FASS' Extreme Water Separator technology.
• 2 Micron absolute filtration rating.
• 100% drop-In, no additional modifications required.
• Retains the factory in-tank lift pump.
• Internal air separation passages for removing entrained air and air vapor.
• Electric heater options available for improved cold weather reliability.

• For those with a 19-20 Cummins, D12RK1001 is necessary if you're truck has, or is going in for the CP3 recall. These fittings correctly plumb the Fass feed line.
• Installation of this kit on a cab and chassis may require modifications.
• This plug-and-play filtration system retains the Cummins OEM in-tank fuel pump.
• This Drop-In Series System requires the filters XWS3002XL & CWS1010
• The Drip-in series Fass for the Cummins was designed to be mounted in the factory water separator location and may not work with aftermarket fuel tanks that have greater fuel capacity than the stock fuel tank. You must verify that you have adequate space to mount the drop-in series Fass system if you have an aftermarket fuel tank. 

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