Description
Fits
| Year | Make | Model | Engine |
| 2020 - 2024 | GM/Chevrolet | Crew Cab Short Bed | L5P 6.6L Duramax |
Note: If you have a Crew Cab Long Box, Click Here
This drop - in fuel system is a game - changer for your L5P Duramax. It shields the engine from fuel contamination problems. Without proper filtration, modern diesel injection systems can wear out quickly, costing you a fortune. But this system removes over 99% of water, air, and debris down to 2 microns, preventing premature failure of the injection system.
Moreover, by getting rid of contaminants, it boosts MPG (results vary), restores horsepower, and sharpens throttle response. Fass's Extreme Water Separator (XWS) with industry - leading water removal (proven to exceed 99% by third - party) adds extra protection. If it reaches capacity, it stops the truck to avoid major fuel system damage.
Part Number: DIFSL5P2001
Features
- It's the only drop - in L5P filtration system that keeps the water - in - fuel sensor fully functional!
- It has air separation, a unique feature in drop - in L5P filtration systems!
- It's plug & play, super easy to install.
- No need to change tuning or clear codes.
- It increases fuel lubricity by up to 10% by removing air and vapor.
- It extends the life of fuel injection system components.
- It offers over 99% free and emulsified water separation with Fass's XWS technology.
- It has a 2 - micron absolute filtration rating.
- It's 100% drop - in, no extra modifications needed.
- It retains the factory in - tank lift pump.
- It works with the factory plastic cap or billet filter cap.
Notes
- THIS IS NOT A LIFT PUMP! It's an air separation/filtration system using your factory lift pump.
- Installing this kit on a cab and chassis might need modifications. Drop - In Fuel Systems are plug - and - play filtration upgrades and are not compatible with Fass Fuel Sump Kit. No additional items are required for installation. It uses the L5P Duramax OEM in - tank fuel pump for fuel flow.
Installation
Warranty
Parts Only
- Limited Lifetime Warranty
Additional Info
- FASS Drop - In Technology is designed for industry - leading filtration with easy installation. If you're handy, you can install it in your driveway in less than an hour. It offers the same high - quality filtration as Fass's Titanium Signature Series and Industrial Series.
- Performance Radius Cuts (PRC) improve fuel flow in the FASS System. They prevent air and vapor from re - entering the fuel and stop eddy currents. FASS Drop - In Fuel Systems are the only ones with these exclusive cuts, unlike lesser competitors.
FAQ
Will the Drop - In Series System for the L5P Create Excessive Back Pressure on the Lift Pump? No! The FASS R&D team reduced pressure drop by about 1 PSI compared to the OEM system through engineering and testing. It maximizes internal porting for better flow and superior filtration.
Why Does the Drop - In Series for the L5P Utilize an OEM Water Separator? We use the OEM water separator because of the design of the OEM water in fuel sensor/fuel heater. Fass's Drop - In system is the only one that allows the water in fuel sensor to work properly on the dirty side of the element.
Using this drop - in diesel fuel system is quite straightforward. First, make sure your vehicle is the right fit (2020 - 2024 GM/Chevrolet Crew Cab Short Bed with L5P 6.6L Duramax). If you have a Crew Cab Long Box, check the provided link. It's a plug - and - play system, so no need for complex tuning changes or code clearing. Just install it according to the instructions and it'll start protecting your engine right away. When it comes to maintenance, keep an eye on the water - in - fuel sensor. The system is designed to remove over 99% of water, but if the Extreme Water Separator (XWS) reaches capacity, it'll shut down your truck to prevent damage. So, regularly check the system and replace filters as recommended. Remember, this is not a lift pump; it uses your factory lift pump. Also, if you're installing it on a cab and chassis, there might be some modifications needed. It's not compatible with the Fass Fuel Sump Kit. Overall, this system will boost your vehicle's performance, improve fuel efficiency, and extend the life of your fuel injection components.
