Parts such as the 016 Inlet Dict: Nut, Intake Manifold, Clamp, Rubber Sleeve are included in the M600 2001 Eu (monster 600) 9151-0561d 016 Inlet Dict parts fiche.
The lowest price component in this 016 Inlet Dict parts-list fiche is the Aluminium Gasket.
Of all the components used in this assembly the Intake Manifold is the most expensive.