The best all-around use kit; if you do a bit of everything with an ATV/UTV this is the kit for youGreat for trail riding, occasional mud and sand riding, plowing and haulingMakes up for power loss and slow response of adding oversized tiresDesigned to improve low- and mid-range accelerationHelps decrease belt slippage, which will decrease clutch heatEach kit will enhance back shifting and throttle responseField tested to assure satisfactionDesigned for stock motor and exhaust