On this parts fiche the Clamp D 12.5 Tube is the most specified component.
The most reasonably priced component used on the Civic 1997 (v) 4dr Dx (ka,kl) Breather Chamber is the Bolt,flange,6x14.
Parts such as the Breather Chamber: Valve Assy,pcv, Tube B,brthr, Tube,pcv, Bolt,flange,6x14 are included in the Civic 1997 (v) 4dr Dx (ka,kl) Breather Chamber parts fiche.