The component with the lowest price in the OPTIONAL PARTS(AIR CLEANER-BEL CON) schematic is the Bolt,6x16.
On this parts fiche the Bolt-flanged,8x30,bla is the most specified component.
Some items from this specific schematic: Nut,lock,10mm, Filter-assy-air, Collar,10.5x16x50, Bolt-flanged,10x75.