Updated: 10/27/2025
FASS Duramax Flow Enhancer Fuel Pump: The Duramax Flow Enhancer is modeled around our very successful DDRP series and is now available for the GM Duramax. GM Duramax trucks do not have a stock lift pump which forces the injection pump to “pull” the fuel all the way from the tank, creating a vacuum and constantly introduces more air and vapor into your fuel. The Dura-Max Flow Enhancer creates a postive flow of fuel, “pushing” it to your injection pump, eliminating vacuum and drastically reducing air and vapor in your fuel.