Polaris Pro R Supercharger Tensioner for Kraftwerks Kit

Bolt on upgrade for your Kraftwerks Polaris Pro R supercharger kit. No more bent tensioners and broken serpentine belts. Replaces the spring tensioner with a robust locking screw tensioner. Comes with over-sized billet pulleys and SKF bearings rated to handle the high RPMS and load that the Pro R produces. Components are CNC machined in the USA.