6Pcs FS1098 Fleetguard Fuel water Separator Filter Cummins 5319680 Freightliner. New FS1098 Fuel Water Separator for use on Cummins B6.7L, ISB6.7L, QSB6.7L and L9 Engines Model Year 2017 – 2021. Manufactured by Cummins Filtration Fleetguard, the OE Manufacturer of Cummins Engine Filtration.