This is a new pipe temp sensor which will fit nearly any Polaris snowmobile equipped with such sensor. These aftermarket sensors meet or exceed factory specifications. Through EGT data logging we were able to develop a great replacement at less cost than the factory sensor. This sensor works great with your stock or aftermarket pipe. Quality sensor that will last! The factory sensors are known to go bad and cause engine tuning issues. Fits: 2008-2017 all 600 & 800 2 stroke models including: Dragon, IQ, switchback, touring, RMK, shift, switchback assault & IQR race sled. All chassis from IQ, Pro-R, & Axys. Replaces factory pipe temp sensor part #: 4013133 Will not fit some 2018 models with the updated pipe temp sensor