The component with the lowest price in the CYLINDER HEAD schematic is the Pin,dowel,6.2x8x14.
A sample from the products for the Cylinder Head include: Washer,10.5x20x1.6, Bolt,banjo,12x40.5, Gasket,14x19.5x1.4 (nas), Gasket-head (nas).
The most expensive part in this assembly is the Head-comp-cylinder.