8 0 FLEETGUARD FS20121 Fuel Filter Assembly for Cummins ISB/ QSB $500 USD (SURPLUS NEW) Fleetguard FS20121 OEM Fuel Water Separator for Cummins ISB QSB Diesel Engine, for sale!!! Cummins Part #: 5528103, 5473458; Stock #: FF1153 For more information about this... ConditionNewFits To Make(s)CumminsFits To Model(s)ISB/ QSBPart Number5528103Stock NumberFF1153 MLS Number13982642CategoryFuel Filter Assemblies Last Updated11/13/2025 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info