The component with the lowest price in the CYLINDER HEAD (2) schematic is the Screw Cross 5x8.
A sample from the products for the Cylinder Head (2) include: Orifice,feeder,1., Dowel,pin,8x14, Bolt,flange,6x40, Holder Set (c-d).
Of all the components used in this assembly the Head Assy.,rr.cyl is the most expensive.