Roger Clark Motorsports High Grip Timing Belt Bracket Tensioner & Idler KitThe High Grip Tensioner System has been developed as a solution to the problem of belts bouncing and skipping teeth at high RPM, which can have catastrophic results. For many years, race and rally teams have preferred to use the original 2 piece tensioner system as it is more reliable than the later single piece tensioner. However, this has the disadvantage of not using a small idler bearing to reduce belt bounce and flex. RCM's solution to this