CrbBshKt, Carburetor Bushing/Pivot, Carburetor Bushing/Pivot; For Use w/All GM And Most Holley Carbs w/0.5 in. Dia. Throttle Hole; Accommodates 1/4 in. Throttle Rod;, Get smooth trouble-free throttle operation with a new bushing. Fits 1/4 in. diameter rod., Smooth Throttle Operation, Fits 1/4 in. Diameter Rod, Carburetor