BMP stage 2 clutch kits have many benefits over stock. Not only does it produce excellent performance gains, but the belt life is also increased dramatically. The Arctic Cats are know for a short belt life, and at almost 200 dollars each that's hard to swallow. The Stage 2 kit fixes that problem and gain big performance in the mean time.The Stage 2 clutch kits are simply the best modification for performance and longevity on your Arctic Cat snowmobile. Great performance, cooler clutches, and much longer belt life. This truly is a must have modification.