4 0 Fleetguard FS1065 OEM Fuel Water Separator With Filter head 4939058 291221400 $129.99 USD (SURPLUS NEW) FleetGuard FS1065 OEM Fuel/ Water Separator, for sale!!!! Cummins Part #: 4939058;Filter Head P/N: 391221400;Stock #: FF1158 For more information about this listing, shipping,... ConditionNewPart Number4939058Stock NumberFF1158 MLS Number14021977CategoryFuel Filters Last Updated12/9/2025 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info