Some items from this specific schematic: Gasket,ex Pipe (nas), Gasket Kit A (mca), O-ring,7.8x2.2, Seal,valve Stem.
The O-ring,7.8x2.2 is the cheapest item from this partsfiche.
With a quantity of sixteen pieces, the Seal,valve Stem is the most used part in the GASKET KIT A diagram.