Parts such as the Breather Chamber: Tube Comp,pcv, Tube,brthr Pipe, Valve Assy,pcv, Clamp,d15 Tube are included in the Civic 1990 (l) 4dr Ex (ka,kl) Breather Chamber parts fiche.
The component with the lowest price in the BREATHER CHAMBER schematic is the Clamp D 12.0 Tube.
Of all the components used in this assembly the Set,brthr Chamber is the most expensive.