New for 2021-22 season is our billet thermostat housing for the ski doo 850. If your sled runs too hot your loosing Hp! Our billet thermostat housing will keep your sled running cool with our high flow thermostat. Your sled has a digital temperature gauge that you can monitor on those long wot pulls. We find that over 108F the engine will begin to loose power. We see this on the dyno and in the field drag racing with gps datalogger. Please note that adequate snow is required to get thrown up into your heat exchanger to remove the heat. This product will not eliminate overheating issues on hard icy trails.