All Cog Pulleys require the use of a pulley hub:
F1/F2 Hub and Hardware Bag part number #PRC-3FADR-021
F3/F4 Hub and Hardware Bag part number #PRC-3FADR-023
P1SC-F2 Superchargers use standard cog Pulleys (Listed)
F2 Reverse, F3, F4 Superchargers use "F3" Pulleys (Not Listed)
**Please call if you are looking for "F3" or Flanged Pulleys
All pulleys listed are 50MM. For 75MM, please call us at 816-340-6755
New Hardware is included in every pulley purchase.