The hub is made from billet heat treated steel, has two .250" keyways 180 degree's apart. Uses six .375" bolts on a 2.782" bolt circle and is made to work with 4-71 thru 18-71 roots or screw superchargers.
This hub is for all internal balance Hemi engines including 426, 440, BAE, KB, TFX and many more. Hub measures from pulley mounting surface to crank gear 1.480".
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