Looking for a quick change hub for your supercharger? Then look no further! This hub conversion kit fits your MP112 and 122 jackshaft superchargers. The hub and washer are made from 303 series stainless steel, and then passivated for lasting beauty. The nylon insert locknut is 18-8 stainless steel, and finishing off the kit are four, stainless steel, 12 point ARP bolts. Using your existing key and this kit adds great looks to your engine bay, and ease of pulley changes to your supercharger.

 Note: Does not fit the Magnacharger truck Radix superchargers. (Nose drive "J" tube style). 

Shaft diameters are not the same.