146595 Fram Group C4163 Fram, C4163, Fuel Filter Cartridge, Designed To Meet The Needs Of Each Engine, Primary Filters Are Designed For Balance Between Low Restriction Required Efficiency, Secondary Filters Are Designed For Maximum Particle Removal To Prevent Wear In Injectors, Pumps Valves, Designed As A Fuel System Primary Secondary Working Together For Optimum Fuel System Performance, Filter Bodies Bottom Plates Are Engineered To Resist Pressure Vibrations Encountered In Use.