Complete gasket set for the Kubota D1503 (83 mm bore) — including variants D1503-M, D1503-M-E3, and D1503-L-A. Includes head gasket, valve cover gasket, valve stem seals, manifold, oil pan, and timing cover gaskets plus front + rear crankshaft oil seals. Direct OEM replacement (ref. 1G720-03310).