Parts such as the Clutch: Gear, Pump Drive, Nut (3y1), Plate, Clutch 2, Gasket 256113960000 (nas) are included in the Xj600s 2000 4lx7 England 104br-300e1 Clutch parts fiche.
The Clutch assembly is constructed from several parts from which the Primary Driven Gear Comp. is the most expensive.
The most reasonably priced component used on the Xj600s 2000 4lx7 England 104br-300e1 Clutch is the Circlip(10w).