The Valve assembly is constructed from several parts from which the Arm, Valve Rocker is the most expensive.
A sample from the products for the Valve include: Retainer, Valve Spring, Seal, Valve Stem, Spring, Compression, Valve, Exhaust.
This part-list fiche shows all the components that make up the Ft9.9 (e/er)d 1990 Valve .