Some items from this specific schematic: Dowel,pin,5x8, Bolt,flange,6x16, Cap,cable Guide, E Ring,special,7m.
The component with the lowest price in the EXHAUST VALVE schematic is the Bolt,socket,6x16.
With a quantity of two pieces, the Bolt,socket,6x16 is the most used part in the EXHAUST VALVE diagram.