The FASS DFD-4000 Duramax Fuel Filter for your 2001-2016 GM 6.6L Duramax is for use after the installation of a FASS Fuel Air Separation System. Once installed the factory fuel filter is no longer needed and can be easily removed by using this Factory Fuel Filter Canister. Because your Duramax fuel filter is located after the FASS filtration system you will still need to replace the factory filter every 5,000-8,000 miles. This filter kit will replace your now useless fuel filter with a spin on canister that will allow fuel to flow freely into the engine, saving you even more money. This spin on Fuel Filter Kit is a perfect addition to your FASS Titanium diesel fuel pump and comes with all required hardware for a professional installation.


Features:
•Installs In Place Of Stock Filter

•Allows For Unrestricted Fuel Flow To Engine

•Built-In Gauge Port For Fuel Pressure Monitoring
•Eliminates Costs Associated With Changing Stock Filter