On this parts fiche the Gasket,exhaust (nas) is the most specified component.
nine components are shown in this Gsx650f 2009 (k9) Usa (e03) Gasket Set exploded diagram.
The most reasonably priced component used on the Gsx650f 2009 (k9) Usa (e03) Gasket Set is the Gasket,tensioner Adjuster (nas).