Arctic’s flagship H-2 4x4 model is a powerhouse in stock form. This simple clutch recalibration helps improve the acceleration even more. The new set of rollers provided are complete “drop in” assemblies for quick installation, complete with new composite outer housings. Although mostly intended, and a great improvement, to help recover losses from bigger tires or high elevation, this simple kit also helps with quicker acceleration even with stock tires. When used with stock tires, only a very slight top end speed loss was observed. Great bang for the buck.