The 04 Valve is made up of components including this Valve, Exhaust which is the most expensive.
Some items from this specific schematic: Seal, Valve Stem Oil, Shaft, Rocker 2, Washer, Lock (3y3), Lock, Valve Spring (447).
The most reasonably priced component used on the Sr400 2014 2rd1 Europe 1n2rd-300e1 04 Valve is the Screw, Hexagon (20x).