The Cylinder Head is made up of components including this Head Assy,cylinde which is the most expensive.
Some items from this specific schematic: O-ring,19x3, Racing Spark Plug Iridium R0409b-8, Bolt Flang 6x20, Pin,dowel,9x14.
Of all the components that make up this Cylinder Head the Nut,square,5mm has the lowest price.