The component with the lowest price in the EXHAUST MANIFOLD schematic is the Nut,flange,8mm.
Some items from this specific schematic: Gskt, Exh Mnfld (nas), Stay,exh Mnfld, Mnfld Assy,exh, Bolt,stud 10x24.
The most expensive part in this assembly is the Mnfld Assy,exh.