The Er500b1 Er5 1997 United Kingdom Fr Nl Ar Fg Nr Breather Cover/oil Pan consists of twelve pieces with the Pan-oil being the most expensive.
In this schematic the "Bolt-flanged-small" is used most often.
Some items from this specific schematic: Gasket,oil Pan (nas), Valve-assy-relief, Bolt-flanged, Ring-o.