2003-2007 Cummins Drop-In Series Diesel Fuel System (DIFSRAM2001)

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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 2003-2007 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.

• FASS Drop-In Technology was developed to achieve industry-leading filtration with the simplest possible installation—making this Drop-In Series Systems a true bolt-in upgrade. If you’re mechanically inclined, a Drop-In Series Fuel System can be installed in your driveway in less than an hour! But don’t let the easy installation fool you—the Drop-In Series Fuel Systems offer the same world-class filtration as the Titanium Signature Series and Industrial Series lines.
• Performance Radius Cuts (PRC) are an advanced machining technique used to improve the flow of fuel through the FASS System by creating smooth-flowing cuts within the filtration system. This prevents the reintroduction of air and vapor back into the fuel and prevents eddy currents from forming within the corner of a 90° sharp angle. FASS Drop-In Fuel Systems are the only Fuel Air Separation System that incorporates these exclusive Performance Radius Cuts, lesser competitors commonly use T-Bone and square 90° fittings that can limit fuel flow, cause restrictions and reintroduce air back into your fuel.

Part Number: DIFSRAM2001

• 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.

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• 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.