The lowest price component in this Air Cleaner parts-list fiche is the Cushion.
The thirty-six Vl800c Boulevard C50 2011 (l1) Usa Californ Canada (e03 E33 E28) Air Cleaner component parts are all listed in this schematic.
Some items from this specific schematic: Sensor,air Temp, Washer, Case Assy,air Cleaner, Tube,breather.