Parts such as the Cylinder Head: Pin,dowel,6.2x8x14, Washer,10.5x20x1.6, Clamp, Head-comp-cylinder are included in the Er500b1 Er5 1997 United Kingdom Fr Nl Ar Fg Nr Cylinder Head parts fiche.
Check out any of the seventeen Cylinder Head components enlisted.
The Cylinder Head is made up of components including this Head-comp-cylinder which is the most expensive.