With a quantity of four pieces, the Bolt,flange,6x28 is the most used part in the EXHAUST VALVE diagram.
Some items from this specific schematic: Holder Comp., Washer,thrust,8mm, O Ring, 30.8m/m, B/brg Rad N/com.
The component with the lowest price in the EXHAUST VALVE schematic is the Pin,lock,8mm.