FASS DIFSL5P1001 DROP-IN SERIES FUEL SYSTEM FOR 17-23 GM DURAMAX 6.6L L5P

Fits: 2017-2019 Crew Cab Short Bed L5P Duramax

Fits: 2017-2024 Crew Cab Long Bed L5P Duramax

Please Note: Installation of this kit on a cab and chassis may require modifications. Drop-In Fuel Systems are a plug-and-play filtration upgrade and are not compatible with our Fuel Sump Kit. No additional items are needed for installation. This plug-and-play filtration system utilizes the L5P Duramax OEM in-tank fuel pump for fuel flow.

The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the L5P Duramax. Backed by our limited lifetime warranty, the Drop-In Series Fuel System protects your L5P Duramax from the issues caused by fuel contamination.

Without proper fuel filtration, modern diesel injection systems are prone to excessive wear, which can cost THOUSANDS! By removing over 99% of the water from your diesel fuel, along with entrained air and debris down to 2 Microns, the Drop-In Series System protects the L5P’s injection system from premature failure.

Additionally, by eliminating the contaminants mentioned above, our Drop-In Series System for the L5P Duramax optimizes MPG (results will vary), restores horsepower, and sharpens throttle response.

And if reliability, optimized MPG, restored horsepower, and a sharper throttle response isn’t enough, this system can be installed in an hour or less! This is a true plug-and-play system, requiring no cutting, wiring, or additional modifications. Better still, this system requires ZERO tuning changes! Whether your L5P is stock or modified, our Drop-In Series Systems will not require adjusting tunes or clearing any codes.

Our industry-leading water removal capabilities (3rd-party proven to exceed 99%) are reinforced by the unique design of our Extreme Water Separator (XWS). If our XWS reaches capacity, it acts as a dam, shutting down your truck and preventing major destruction of fuel system components.

• FASS Drop-In Technology was developed to achieve industry-leading filtration with the simplest possible installation—making our 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—our Drop-In Series Fuel Systems offer the same world-class filtration as our 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 aluminum housing. This prevents the reintroduction of air and vapor back into the fuel and prevents eddy currents from forming within the corner of a 90-degree 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-degree fittings that can limit fuel flow, cause restrictions and reintroduce air back into your fuel.

2017-2024 L5P Duramax Drop-In Series System Features:

FASS Drop-In Series Duramax FAQ

• Will the Drop-In Series System for the L5P Create Excessive Back Pressure on the Lift Pump?
  In short, no! Through extensive engineering and testing, the FASS R&D team was able to decrease pressure drop (differential pressure) approximately 1 PSI from the OEM filtration system. This was accomplished by maximizing the internal porting size to allow a system that flows more freely in addition to adding superior filtration.

• Why Does the Drop-In Series for the L5P Utilize an OEM Water Separator?
  The reason we utilize the OEM water separator is due to the design of the OEM water in fuel sensor/fuel heater. We are the only Drop-In style system that allows the water in fuel sensor to properly function as they must be on the DIRTY SIDE of the water separator element to detect the water before it makes it to the clean side. If the sensor is placed on the clean side of the element, by the time the sensor detects the water it is too late! With the Drop-In Series FASS, you will get properly functioning water in fuel light and fuel heater!

FASS Fuel Systems Drop-In Series Diesel Fuel System for 2017-2024 L5P Duramax | Part No: (DIFSL5P1001)

The FASS DIFSL5P1001 Drop-In Series Diesel Fuel System is the ultimate solution designed specifically for the 2017-2023 GM Duramax 6.6L L5P engine. Engineered by FASS Fuel Systems, this system provides unrivaled protection against fuel contamination with over 99% water removal efficiency, filtering debris down to 2 Microns.

Modern diesel engines are sensitive to impurities in fuel, leading to costly wear and potential system failures. With the Drop-In Series Fuel System, you can safeguard your L5P Duramax from these risks and ensure optimum performance and longevity for years to come.

Not only does this system protect against fuel system damage, but it also improves fuel economy, restores horsepower, and enhances throttle response. Experience the benefits of enhanced engine performance without the hassle of complex installations or tuning adjustments.

The FASS Drop-In Series stands out for its innovative features, including the Extreme Water Separator technology that exceeds 99% water separation, enhancing fuel lubricity by up to 10%. Performance Radius Cuts optimize fuel flow, preventing air and vapor reintroduction for a smoother and more efficient operation.

Experience industry-leading filtration with the convenience of a simple plug-and-play installation that retains the full functionality of the water-in-fuel sensor. With the FASS DIFSL5P1001 Drop-In Series Fuel System, enjoy peace of mind knowing that your L5P Duramax is protected, optimized, and ready to perform at its best.