This schematic depicts all components used in the Civic 2003 (3) 4dr Ex Side Srs (ka) Exhaust Manifold (vtec) partslist.
On this parts fiche the Nut,flange,8mm is the most specified component.
The most reasonably priced component used on the Civic 2003 (3) 4dr Ex Side Srs (ka) Exhaust Manifold (vtec) is the Nut,flange,8mm.