Designed to improve the performance on or off the trails without losing the reliability of your ATV. More efficient in transferring the power of your ATV down to the tires. Designed to improve low- and mid-range acceleration. Decreases belt slippage, which decreases clutch heat. Enhances back shifting and throttle response. Field-tested to assure your satisfaction. Designed for stock motor and stock exhaust. For use at any elevation.