The Screw,tapping,(po)4x is the lowest priced item on this Duct schematic.
Parts such as the Duct: Seal B(side Def), Duct Assy,inst, Seal C, Duct,rear Heater are included in the Civic 2002 (2) 4dr Ex Side Srs (ka) Duct parts fiche.
The Duct assembly is constructed from several parts from which the Duct Assy,inst is the most expensive.