Hub uses six 7/16"- 20 blower pulley bolt holes on a 2.782" bolt circle and is made to work with 6-71 thru 18-71 roots and screw superchargers. 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, Velasco and Winberg crankshafts.
Racer must use a center flange bottom blower pulley with this type of crank hub. Another unique feature of the PSI hub is that the bearing race that is machined into the crank hub so it is a one piece part.
Hub is designed to be used with 3/4" crank bolt.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.