On this parts fiche the Seal Valve Stem is the most specified component.
Of all the components that make up this Gasket Kit A the O-ring,9.6x2.6 has the lowest price.
A sample from the products for the Gasket Kit A include: Gasket,head Cover (nas), Gasket,breather P (mca), Gasket Kit A, Gasket,cylinder H (nas).