Parts such as the Carburetor Parts: Ring-o,float Chamber, Screw, Main Jet,2nd #125, Cap-starter Plunger are included in the En450a4 454ltd 1988 Usa California Canada Carburetor Parts parts fiche.
The Carburetor Parts assembly is constructed from several parts from which the Valve,vacuum is the most expensive.
The Screw-pan-cros is the lowest priced item on this Carburetor Parts schematic.