The O Ring(d:2.4,id:15.8) is the lowest priced item on this Gasket Set schematic.
The Gsxr600 2011 (l1) Usa (e03) Gasket Set consists of eighteen pieces with the Gasket Set (nas) being the most expensive.
This GASKET SET assembly utilises six Washer,cyl Head Cover(s) - the highest specified component.