FASS Drop-In Series Diesel Fuel System for GM/Chevrolet 2017-2025 Duramax 6.6L

FASS Drop-In Series Fuel System – for 2017 to 2025 GMC/Chevrolet, Duramax 6.6L
Please Note: THIS IS NOT A LIFT PUMP! This is an air separation/filtration system that utilizes your factory lift pump.

Fits: 2017-2025 Crew Cab Short Bed L5P Duramax & 2017-2025 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 retains the Duramax OEM fuel pump.

The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the 6.6L Duramax. Backed by our limited lifetime warranty, the Drop-In Series Fuel System protects your 6.6L Duramax from the issues caused by fuel contamination.

If you drive a GMC/Chevrolet with a Duramax diesel engine and want better fuel filtration, improved reliability, and injector protection without adding an external frame-mounted pump, the FASS Drop-In Series Fuel System is the perfect solution.

Designed as a direct replacement for the factory engine fuel filter, the Drop-In Series delivers cleaner fuel, better water separation, and consistent fuel supply while retaining a factory-style installation. It’s the ideal upgrade for stock and lightly modified trucks that demand long-term reliability without added complexity.