GM LS Gen III/IV Series Edelbrock, Stewart, PRW Water Pump Pulley only for Supercharger Girdle, Rev Rotation, GM 8-bolt hub fitment, billet alum, 83mm deep, Polished Anodized ?ÿ PRW now has the answer to strengthen your LS Water Pump Pulley for Supercharged LS Engines! Our Pulley Girdle Kit will bolt on to aftermarket 8-bolt hubs to brace your pulley for supercharged applications. Made of 6061 Billet Aluminum and will include 4 fasteners and thread locker.