Some items from this specific schematic: Gasket,cyli.head (nas), Gasket,ex.pipe (nas), O-ring,7.8x2.2, Gasket,head Cover (nas).
Of all the components that make up this Gasket Kit A the O-ring,7.8x2.2 has the lowest price.
The Gasket Kit A assembly is constructed from several parts from which the Gasket Kit A is the most expensive.