On this parts fiche the Nut,flange,7mm is the most specified component.
The sub assemblies and components that make up this Exhaust Muffler include this Pipe Comp Exh.., the most expensive part.
The most reasonably priced component used on the Cbr600f Hurricane 1995 (s) Portugal / Kph 34p Exhaust Muffler is the Rubber A,stand.