Some items from this specific schematic: Washer, Spl, 11x28, Mnfld Assy, Exh, Cover B,exh Mnfld, Bolt Spl, 10x22.
The Bolt Flange 8x10 is the lowest priced item on this Exhaust Manifold schematic.
The Exhaust Manifold assembly is constructed from several parts from which the Mnfld Assy, Exh is the most expensive.