The component with the lowest price in the GASKET KIT schematic is the Gasket Kit,cyln B (nas).
Parts such as the Gasket Kit: Gasket Kit,cyln B (nas), Gasket Kit,at Transm (nas), Gasket Kit,cylind (nas) are included in the Civic 2004 (4) 2dr Ex Side Srs (ka) Gasket Kit parts fiche.