FASS Drop-In Series Diesel Fuel System

FASS stands for Fuel Air Separation System and is a combination diesel fuel lift pump and fuel filtration system that is designed to improve your diesel truck’s fuel mileage, engine performance and extend the life of your diesel injection system. Our diesel fuel pump and diesel fuel filters are made in America in order to provide complete customer satisfaction. Regardless of the vehicle you drive, and how you power your life, FASS diesel fuel systems provide the cleanest fuel in order to extend the life of your favorite truck.
An air bubble in the tip provides no fluid damping, allowing the plunger to impact the tip with up to 50% greater force, resulting in damage to the tip and injector.