Once that is done the pulley simply slides on and tightens down with the stainless bolts. This makes for a system that is very easy to switch pulleys. Remove 5 bolts with standard allen wrench tool and you can put on a different size pulley.
ZZPerformance LSA Supercharger Modular Pulley Hub and bolts only
2.5" LSA Supercharger Modular Pulley System Fit Chevy Camaro ZL1/Cadillac CTS-V.
2.4" LSA Supercharger Modular Pulley System CTS-V ZL1 Pulley
2.4" LSA Supercharger Modular Pulley System CTS-V ZL1 Pulley,
12-15 Chevy Camaro LSA Supercharger Modular Pulley System For 09-14 Cadillac CTS
Fit Chevy Camaro ZL1 Cadillac CTS-V 2.7" LSA Supercharger Modular Pulley System