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The Moroso throttle return spring kit for 4500 Holley and King Demon carburetors supplies carburetor-mounted return springs sized for those large-flange applications. It provides replacement hardware to restore proper throttle-return action on 4500-series and King Demon carburetor setups where a carburetor-mounted spring is required.
Moroso 4500 Holley/King Demon Throttle Return Spring Kit - Carburetor Mount
