6.3" diameter w/ 2.3" mounting bolt circle. Chrome Steel Double Groove Crankshaft Pulley (6.9" diameter w/ 2.3" mounting bolt circle). Chrome Steel Single Groove Power Steering Pulley (5-7/8" diameter, key way style w/ 5/8" shaft). (3) Chrome Crank Pulley Bolts and Washers.
Note: For use with V belts. Will not work with press on power steering pumps, Corvettes, or LT1 and LT4 engines.