Edelbrock Part 15032 Tensioner Upgrade Kit is engineered to handle the increased belt stress encountered in high horsepower Edelbrock applications. This kit is an upgrade for part 1596, 1599 15997 Edelbrock Supercharger Systems produced prior to February 2013 and are now included on all systems thereafter. Kits includes tensioner, tensioner mounting bracket, Gatorback drive belt and hardware.