These are for 1.125" shafts that have the dead spline on them. The drive gear has the standard six bolt 5/16-24" bolt pattern with the 1.250" register on the gears.
These gears are used and have been inspected cleaned and ready to run on your supercharger.
NOTE THE BUYER MUST HAVE THE ABILITY TO TIME THESE GEARS WHEN INSTALLING ON THERE BLOWER.
CURRENTLY WE ONY HAVE 8V-71 GEARS IN STOCK.