FASS offers a variety of fuel system accessories for your diesel vehicle. The FASS Fuel System Accessories are designed to allow easier installation, improved fuel flow and the ability to custom tailor your engines exact fuel requirements. FASS Diesel Accessories are designed for quick and reliable performance with your FASS Fuel Air Separation Systems. are accompanied by a set of accessories that extend and add functions to these breakthrough filtration systems. We offer a variety of FASS Accessories for diesel-powered vehicles wanting increased performance at the lowest price.