Parts such as the Duct: Seal Out,fr Def, Duct,rr Htr, Garnish *yr164l*, Clip Snap Fit are included in the Civic 1998 (w) 4dr Lx (ka) Duct parts fiche.
Of all the components used in this assembly the Duct,rr Htr is the most expensive.
The Screw,tapping,(po)4x is the lowest priced item on this Duct schematic.