The below engine parts Cummins oil pumps are for the 4BT3.9/6BT5.9/6CT8.3/6LT8.9/ISDe/ISLe/ISZ/M11/NT855/ KT19/KT38/KT50/ISF2.8/ISF3.8/ISM11/QSM11 series Cummins engine. Part Name Part No. Part Name Part No. NT855 Oil Pump 3821579 DCEC 4BT Oil Pump 3926203 CCEC N14 Oil Pump 3803698 DCEC 6BT(5.9) 3941742 CCEC K19 Oil Pump 3047549 DCEC 4BT Oil Pump 3937027 …