Fleece Performance L5P Duramax Fuel Filter Upgrade Kit (FPE-L5P-FFBA-20) – 2020-2024 Short Bed

Protect Your L5P Fuel System with a Premium Spin-On Upgrade

The Fleece Performance L5P Fuel Filter Upgrade Kit (FPE-L5P-FFBA-20) converts your factory cartridge-style fuel filter to a high-capacity spin-on canister system. This patented upgrade delivers better filtration, longer service intervals, and easier maintenance while preserving full functionality of your factory PTC fuel heater for reliable cold-weather performance.

Designed for 2020–2024 GM 6.6L Duramax L5P engines, the kit features a precision-machined, black-anodized billet aluminum base that mounts in the exact factory location using quick-disconnect fittings for a clean, OE-quality installation. The design maintains proper fuel flow across the heating element and includes a convenient 1/8" NPT port for fuel pressure monitoring — ideal for tuned trucks or anyone who wants to keep an eye on system health.

Key Benefits

• Increased filter capacity for longer change intervals and fewer services
• Wider selection of affordable, readily available spin-on replacement filters
• Superior protection for your high-pressure fuel pump (CP4) and injectors
• Retains factory fuel heater performance in cold weather
• Easy, clean filter changes compared to the stock cartridge design
• Built-in port for fuel pressure gauge or sensor

What’s Included

• Black anodized billet aluminum fuel filter base with integral mounting
• Donaldson high-efficiency fuel filter & water separator (P/N P553203)
• Quick-disconnect fittings
• Distribution filter block / coupler
• All necessary O-rings, hardware, and plugs
• 1/8" NPT port (ready for optional pressure monitoring)

Vehicle Fitment

• 2020–2024 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD 6.6L L5P Duramax (Short Bed configurations)
• 2024 Regular Cab Long Bed L5P models

Important Notes

• For Crew Cab Long Bed 2020–2024 L5P trucks, use Fleece P/N FPE-L5P-FFBA-1719 instead.
• Also fits select 2020–2022 LM2 and 2022.5+ LZ0 3.0L Duramax applications (note: the larger filter extends approximately 2" below the frame rail).
• CARB EO# D-834-24
• Replaces GM filter base part numbers 13543066 / 13539109
• Estimated install time: 30–60 minutes with basic hand tools (detailed instructions included). Reuses the factory fuel heater.

Replacement Filter Donaldson P553203 (Twist & Drain water separator) — available separately for quick, low-cost maintenance.

Give your L5P Duramax the fuel filtration upgrade it deserves. The Fleece Performance kit is a favorite among diesel owners who want better protection, easier service, and peace of mind whether they’re towing, daily driving, or running performance modifications.