The Edelbrock Competition Supercharger 8 rib, 3.50″ Pulley part #15813 is the perfect upgrade for your Edelbrock supercharger kit when more boost is wanted. Compatible with 2016+ Camaro Supercharger kits (use 8 Rib Pulleys standard) and 2011+ Mustang Supercharger kits equipped with optional 8-Rib conversion kit #15879.