A FASS system includes a high-volume fuel pump and a top-tier filtration setup that removes air/vapor, water, and debris (down to 2 microns) before the fuel reaches your engine. FASS stands for Fuel Air Separation System and is a combination diesel fuel lift pump and fuel filtration system. These systems are designed to improve your 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. FASS Motorsports is your 1 source for adventuring, performance and off-road products for Trucks, Jeeps, & Side by Sides (SxS). Via informationstjänsten FASS får allmänhet, hälso- och sjukvårdpersonal, apotek, djurägare och djurvårdspersonal alltid tillgång till aktuell och kvalitetssäkrad information om läkemedel 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. Fuel Systems by Fass available for Powerstroke, Duramax, Cummins and Semi’s. Great selection of FASS Fuel Systems in stock and available in FASS Titanium Signature Series, the New FASS Drop-In Series, FASS Adjustable Fuel System Series, FASS Dodge DRP Series, and FASS Duramax D-MAX Series. All FASS Fuel Systems ship free. Find your FASS Fuel System on sale and purchase here now! FASS Fuel Systems is an American manufacturing company specializing in the engineering, design, and production of fuel systems and accessories for diesel vehicles. The name “FASS” stands for Fuel Air Separation System, which is a perfect acronym for the functionality of a FASS system. Shop below for FASS fuel air separation systems with Fass filters, stand-alone fuel pumps, save money with Fass replacement filters, or just miscellaneous accessories.