Parts such as the Air Cleaner: Resonator, Packing,a Air/c C, Clip,brthr.tube, Bolt,flange,6x14 are included in the Nx250 1989 (k) Usa California Air Cleaner parts fiche.
The Air Cleaner assembly is constructed from several parts from which the Case,air/c is the most expensive.
The twenty-eight Nx250 1989 (k) Usa California Air Cleaner component parts are all listed in this schematic.