13-tooth clutch bell made from HUDY metal, precision-machined on a special gear device. Strategically lightened without having to sacrifice strength or durability to cut back rotating mass. The 3x ball-bearing design originated to get more exact and wobble-free operation. Less play for the clutch bell increases performance and considerably longer lifespan for bearings and clutch bell. Lightweight design with machined openings really helps to reduce temperature build-up inside clutch. Fits just 4-shoe clutch #358400.