FASS Motorsports is your 1 source for adventuring, performance and off-road products for Trucks, Jeeps, & Side by Sides (SxS). For FASS distributors and dealers. Enter a shop's phone number to confirm it is an authorized FASS account before you sell to it. 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. 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 Drop-In Series Diesel Fuel System for Ford 2017-2025 Powerstroke 6.7L $499.00 FASSNotary protects you every time you visit so that you never have to worry about the safety of your financial information. Privacy Policy ©2010–2026 First American Financial Corporation and/or its affiliates. All Rights Reserved. FASS—short for Fuel Air Separation Systems—makes a full line of fuel pumps, filters, and other components designed to remove air and vapor trapped in diesel fuel. 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. Shop FASS Connect. High-performance fuel solutions designed to eliminate air, protect your engine, and maximize reliability and efficiency. 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.