Parts such as the Upper Casing: Manifold, Exhaust, Bolt, With Washer(6b0), Gasket, Upper Casing (nas), Ybs67-10 Washer, Spring are included in the E60mhv 1997 Upper Casing parts fiche.
The Upper Casing assembly is constructed from several parts from which the Casing, Upper is the most expensive.
On this parts fiche the Bolt, With Washer(6b0) is the most specified component.