FASS DIFSL5P2001 Drop-In Fuel System 20-25 Duramax L5P Diesel Crew Cab Short Bed

Vehicle Fitment

2020-2025 Chevrolet Silverado 2500HD 6.6L L5P Duramax Crew Cab Short Bed
2020-2025 Chevrolet Silverado 3500HD 6.6L L5P Duramax Crew Cab Short Bed
2020-2025 GMC Sierra 2500HD 6.6L L5P Duramax Crew Cab Short Bed
2020-2025 GMC Sierra 3500HD 6.6L L5P Duramax Crew Cab Short Bed

Fitment Notes

• Fits 2020-2025 L5P Duramax Crew Cab Short Bed configurations only
• For 2017-2019 Crew Cab Short Bed or 2017-2024 Crew Cab Long Bed, see DIFSL5P1001
• Mounts in factory water separator location
• May not fit with oversized aftermarket fuel tanks - verify clearance before ordering
• Installation on cab and chassis configurations may require modifications
• Retains factory in-tank lift pump - this is a filtration system, not a fuel pump
• Works with stock or modified L5P trucks up to 1200HP
• No tuning changes required

Features

• Drop-In Series diesel fuel filtration system for L5P Duramax
• Removes over 99% of water from diesel fuel
• 2 micron absolute filtration rating
• Only drop-in L5P system with air separation technology
• Only drop-in L5P system retaining full water-in-fuel sensor functionality
• Increases fuel lubricity up to 10% by removing entrained air
• Extends life of high-pressure fuel injection components
• Extreme Water Separator (XWS) technology
• Performance Radius Cuts (PRC) prevent air reintroduction
• 100% plug-and-play installation - no cutting, welding, or wiring
• Installs in under one hour
• Works with factory plastic cap or billet filter cap
• Optimizes fuel economy (results vary)
• Restores horsepower and sharpens throttle response
• Same filtration quality as Titanium Signature Series
• CARB Approved: D-713-3
• Limited lifetime warranty

Specifications

• Brand: FASS Fuel Systems
• Part Number: DIFSL5P2001
• UPC: 850044137275
• Product Type: Drop-In Series Diesel Fuel Filtration System
• Vehicle Application: 2020-2024 GM 6.6L L5P Duramax Crew Cab Short Bed
• Filtration Rating: 2 Micron Absolute
• Water Separation: Over 99%
• Air Separation: Yes
• Lubricity Improvement: Up to 10%
• Power Range: Stock to 1200HP
• Installation Type: Plug-and-Play Drop-In
• Tuning Required: No
• Lift Pump Included: No (Retains Factory In-Tank Pump)
• CARB Certification: D-713-3
• Warranty: Limited Lifetime

Included Components

• (1) FASS Drop-In Series fuel filtration housing assembly
• (1) Extreme Water Separator (XWS)
• (1) 2 Micron filtration element
• All necessary mounting hardware and fittings
• Installation instructions

Product Description

The FASS DIFSL5P2001 Drop-In Series Diesel Fuel System is engineered to provide industry-leading fuel filtration for 2020-2025 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L L5P Duramax diesel engine in Crew Cab Short Bed configuration. Modern high-pressure diesel injection systems are prone to expensive failures when exposed to contaminated fuel, and the FASS Drop-In Series protects your investment by removing over 99% of water from your diesel fuel along with entrained air and debris down to 2 microns. This is the only drop-in L5P filtration system that retains full functionality of the factory water-in-fuel sensor, and the only drop-in system featuring air separation technology that increases fuel lubricity by up to 10% by removing entrained air and vapor. The exclusive Performance Radius Cuts (PRC) machining technique creates smooth-flowing passages within the aluminum housing that prevent the reintroduction of air and vapor into the fuel while eliminating eddy currents that can form in conventional 90-degree fittings.

Installation is truly plug-and-play with no cutting, welding, wiring, or tuning changes required, and the system can be installed in under an hour by anyone with basic mechanical skills. The Drop-In Series mounts in the factory water separator location and retains the OEM in-tank lift pump, making it the most cost-effective solution to protect your L5P's injection system while optimizing fuel economy and throttle response. Compatible with stock trucks or modified applications up to 1200HP. Backed by FASS's limited lifetime warranty.