ARS tensioners are engineered specifically for serious racing enthusiasts. If your car is supercharged you need an ARS tensioner, its the strongest way to eliminate belt slippage. No more broken, shredded or melted belts. Direct bolt on replacement for your stock tensioner. Increase boost and HP by reducing or completely eliminating belt slip. Applications include Hemi, COPO, Ford or GM. Available for Whipple, Procharger, Vortech, Paxton, Edelbrock, Roush or any supercharger in the TVS or Centrifugal family of power adders. ARS Tensioners have been proven on the DYNO and the Race Track and will. As a result of our engineering and the use of custom fabricated springs, hardened steel shafts, needle bearings and bushings the ARS tensioners will outperform anything on the market. LIFETIME Guarantee. Beefcake Racing is an Authorized Dealer for American Racing Solutions, call 1-855-827-7223 for more info.