The Bolt(6x20) is the most widely applied product in the VL800C BOULEVARD C50 2011 (L1) USA CALIFORN CANADA (E03 E33 E28) RADIATOR ( three times ).
The component with the lowest price in the RADIATOR schematic is the Spacer(6.5x10x10).
The Radiator assembly is constructed from several parts from which the Radiator Assy,water is the most expensive.