The component with the lowest price in the VALVE schematic is the O-ring (328,329).
A sample from the products for the Valve include: Spring, Valve Inner, Shaft, Rocker, Screw, Valve Adjusting, Cotter, Valve.
fourteen components are listed in the schematic for this Xg250 2005 4d61 Italy 1d4d6-300e1 Valve .