the FX50934 filter fits with Blue Bird Buses; Freightliner, Hino, Peterbilt Trucks; Racor 325 Series
the FX50933-O filter fits with GRAINGER
the FX50933 filter fits with Optional Fuel/Water Separator on Various Truck Engines with Maximum Flow Rate of 75 GPH (U.S.)
the FX50932-S filter fits with LUBER-FINER
the FX50932-O filter fits with GRAINGER
the FX50932 filter fits with Star Trucks; Mercedes-Benz Engines; Racor Housings