The Valve(s)/camshaft(s) assembly is constructed from several parts from which the Camshaft-comp is the most expensive.
On this parts fiche the Collet is the most specified component.
Parts such as the Valve(s)/camshaft(s): Washer,12.1x19x1.6, Tappet, Retainer-valve Spring, Valve-exhaust are included in the Kaf300-c4 Mule550 2000 Europe Valve(s)/camshaft(s) parts fiche.