Some items from this specific schematic: Screw Tceir M8x30, Stepper Motor, Joint, Air Cleaner, Hose, Fuel Return.
The lowest price component in this 016 Intake Manifolds parts-list fiche is the Nut M8.
The sub assemblies and components that make up this 016 Intake Manifolds include this Throttle Body, the most expensive part.