QSL9 Cummins Valve Tappet 3931623 Parts Catalog Ref No. Part Name Part No. Required 1 Valve Tappet 3931623 12 Above is the introduction of the 3931623 Cummins Valve Tappet, while if you need Valve Tappet 3931623, complete Cummins engine or other Cummins product, please further consult our sales.