Parts such as the Gasket Set: Gasket,tensioner Adjuster (nas), Gasket,muffler Joint (nas), O Ring(d:2.62,id:20.3), Washer(10.6x25.5x2.3) are included in the Gsxr600 2004 (k4) Usa (e03) Gasket Set parts fiche.
The O Ring(d:3.1,id:16.8) is the lowest priced item on this Gasket Set schematic.
This GASKET SET assembly utilises six Washer(10.6x25.5x2.3)(s) - the highest specified component.
