QSM11 Cummins Themostat 4973373 Parts Catalog Ref No. Part Name Part No. Required 1 Themostat 4973373 2 Above is the introduction of the 4973373 Cummins Themostat, while if you need Themostat 4973373, complete Cummins engine or other Cummins product, please further consult our sales.