Competition Clutch 4 puck solid ceramic disc for Mazda 13B non-turbo. This Competition Clutch disc is designed for the serious enthusiast with considerable modifications. Each disc features 8 high-coefficient ceramic pads for quick engagement and extreme duty friction. The four pucks reduce the area of contact with the pressure plate resulting in an increase in pressure per area from the plate on each puck. Therefore, increasing the torque capacity and preventing slippage under load. Competition Clutch's specifically designed high torque disc delivers maximum holding capacity without compromise. The unsprung disc is lighter than its sprung counterpart, helping reduce rotational mass in the drive train. The absence of a sprung assembly also provides a harder engagement. Disc size : 225mm x 15/16 x 22T. We now include a FREE clutch alignment tool with this disc.