New from Alphaeus Racing Technology is a complete billet upgrade tensioner system for Kraftwerks Pro R Supercharger kits with original belt routing layout. This tensioner features a fixed, solid state tensioner setup that is adjustable and bolts into a set position to maintain belt tension. This system has been rigorously tested and shown to eliminate belt, tensioner and pulley failures. Comes with upgraded billet pulleys and new machined front plate.