Loading... Please wait...This new design, Billet Aluminum Belt Tensioner with 76mm Aluminum Billet Idler Pulley is a must have. It is made of heavy duty CNC machined Aluminum. Which makes it stronger that stock . This bracket prevents tensioner from bending & breaking under heavy loads and reduces belt slip. This tensioner is good up to 500HP. If you are making over 500HP check out our other options..