Mr. Gasket Carburetor Bushing Kit reduces the 1/2 " throttle shaft hole to 1/4" inside diameter which makes for an easy throttle linkage attachment. Can be used to replace the stock rubber unit. This carburetor bushing kit is machined from cold roll steel then bright zinc plated. The two piece bushing measures 9-1/6" wide when installed and fits most 4-bbl. carburetors with 1/2" throttle linkage hole. Their split-bushing design permits simple installation and eliminates the sloppiness present when rubber bushings are used.