This hub is for all internal balance Hemi engines including 426, 440, KB, BAE, TFX, CN and many more. Hub measures from pulley mounting surface to crank gear 2.70" and works with Bryant and Winberg crankshafts with the dual .250" keys.
Racer must use a center flange bottom blower pulley with this type of crank hub.
Hub is designed to be used with 3/4" crank bolt.