FASS Diesel Fuel Systems is a manufacturer dedicated to its craft. We maintain customer loyalty by producing the highest quality products and components. FASS diesel Fuel Systems are designed to eliminate air and vapor trapped in diesel fuel. When air and vapor are eliminated and replaced with pure fuel we are able to provide your diesel engine with the cleanest burning fuel possible. Our diesel fuel systems are specifically designed to increase and improve your diesel truck’s fuel mileage. Your local FASS fuel system dealers are dedicated to providing the service and support you deserve. Please take a look at our products and accessories and feel free to chat with one of our technical support representatives if you have any questions at all.