COMP Cams Distributor Gears 12149 COMP Cams Composite Distributor Gears have undergone stringent testing in various applications with positive results. These super tough gears show great promise in solving the wear issues associated with bronze gears in racing applications. They are available in several shaft diameters for popular street and race applications. .009" Oversized, .491" I.D. Composite Distributor Gear for SBC/BBC COMP Cams Composite Distributor Gear for Small and Big Block Chevrolet, .009" Oversized COMP Cams Dist Gear .009in Oversized Gm