ADM 2.35" 6 Rib LT4 Truck Conversion Pulley 101-6R-TK235H  Increases boost ,blower speed and heat on the Lt4 Supercharger. 

All pulleys are raw machined aluminum. Pics are just for reference 

ADM LT4 Truck pulleys work with 5.3 liter and 6.2 liter engines

"FOR LT4 CORVETTE SUPERCHARGERS ON LT TRUCK ACCESSORIES"