Dodge Torque Limiter Sprocket, A-Plate, Chain Number: 40, 23 Teeth, For Use With: Torque-Tamer Size 25 Mechanical Clutch, 3.94 in Outside Dia, 3.672 in, 0.284 in Thickness Bored to fit Torque-Tamer clutchesSprocket face machined smooth and parallel to provide proper interface with friction discsRubbing sides are micro ground to 65 to 125 micro-in