The below engine parts Cummins thermostat 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. Assembly,Thermostat Shell and Support 3065805 DCEC thermostat 3967195 Assembly,Thermostat Shell and Support 3176071 DCEC thermostat 3972071 Support,Thermostat Housing 3010916 DCEC thermostat 4930594 Support,Thermostat Housing 3200630 DCEC thermostat 3960800 …