POWER STEERING PUMP STEEL PULLEY GM CHEVY KEY WAY ? EDP BLACK Pulley Style: V-belt Power Steering Pulley Grooves: 1-groove, V-belt Underdrive: No Overdrive: No Power Steering Pulley Attachment: Keyway Power Steering Pulley Bore Diameter (in): 0.625 in. Hardware Included: No Outside Diameter (in): 5.750 in.