QSB3.9 Cummins Thermostat 4930315 Parts Catalog Ref No. Part Name Part No. Required 1 Thermostat 4930315 1 Above is the introduction of the 4930315 Cummins Thermostat, while if you need Thermostat 4930315, complete Cummins engine or other Cummins product, please further consult our sales.