Parts such as the Valve: Seat, Valve Spring, Seal, Valve Stem, Cotter, Valve, Shaft, Rocker are included in the Xg250 2005 4d62 Spain 1d4d6-352s1 Valve parts fiche.
The sub assemblies and components that make up this Valve include this Valve, Exhaust, the most expensive part.
The most reasonably priced component used on the Xg250 2005 4d62 Spain 1d4d6-352s1 Valve is the O-ring (328,329).