The most reasonably priced component used on the Rm250z 2005 (k5) Usa (e03) Gasket Set (model K3/k4/k5/k6) is the Washer,exhaust Pipe.
Some items from this specific schematic: Gasket,cylinder (nas), Gasket,crankcase (nas), Gasket,cylinder Cover No.2 (nas), O Ring,cylinder Head No.2.