2017-2024 Duramax Drop-In Diesel Fuel System (DIFSL5P1001)

Fits

Get the most effective & efficient drop-in filtration system for your L5P; this system is easy to install, does not throw codes, and does not require tuning, cutting, welding, or any modifications. Best of all; it optimizes MPG (results vary) all while restoring HP & tightens throttle response.

Part Number: DIFSL5P1001

• The only drop-in L5P filtration system that retains the full functionality of the water-in-fuel sensor
  
• The only drop-in L5P 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 our Extreme Water Separator technology
  
• 2 Micron absolute filtration rating
  
• 100% drop-In, no additional modifications needed
  
• Retains the factory in-tank lift pump
  
• Works with the factory plastic cap or billet filter cap

• THIS IS NOT A LIFT PUMP! This is an air separation/filtration system that utilizes your factory lift pump. 
• 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 Fass 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.

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• 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) by 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. Fass has 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!