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.
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.