New for 2016 is our Hot Rod Sled Shop Inc. STAGE 2 clutch kit for 120-137" Ski-doo 600 HO ETEC sleds. Our stage 1 kit is awesome utilizing the stock ramps. The Stage 2 adds our HRSS2 ramps and different calibration adding even quicker acceleration , lower belt / sheave heat and really good top speed. Several Iron Dog Teams in the famous Alaskan race run this kit- their previous issues were excessive belt heat causing belt problems and lack of speed as heat built up. This kit includes primary spring, secondary spring, progressive helix, HRSS adjustable pin it and HRSS2 ramps.