The most reasonably priced component used on the Civic 2002 (2) 4dr Ex Side Srs (ka) Exhaust Manifold (vtec) is the Nut,flange,8mm.
The Exhaust Manifold (vtec) is made up of components including this Mnfld Comp,exh which is the most expensive.
Check out any of the six Exhaust Manifold (vtec) components enlisted.