*** IN STOCK SHIPS TODAY *** 455 Oldsmobile crank hub made from billet heat treated steel. Hub has two .250" keyways 180 degree's apart, uses six .375" bolt holes on a 2.782" bolt circle with an 2.00" blower pulley register and is made to work with 4-71 thru 16-71 roots superchargers.
This hub is for all internal balance 455 Oldsmobile engines that use a 1.500" crank snout. Hub measures from pulley mounting surface to crank gear 3.560".
Hub does includes a piece of timing tape. RBS can provide a 7in. bolt on degree ring for additional cost #2300-0032.