If dual carbs are added to an engine, the Carburetor Synchronizer Tool helps the truck run with better economy by balancing the airflow between the two carburetors giving equal airflow at all degrees of its throttle opening. By manipulating the idle adjustment screw, each carburetor can be set at the same air intake volume.
The tube, which must always remain in a vertical position, is adjustable through 150° to allow the tool to be used on almost any type of carburetor and manifold installation.