The stock ratchet tensioner over tightens the chain causing premature chain failure

We finally decided that everyone who deals with snowmobile exhaust should have one

This creates a strange flow wave in the airbox and only gains 1hp

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Exhaust Full Velocity / AXYS 800 ('15+) Finish:Chrome The stock ratchet tensioner overThis is a great muffler for those looking to keep quiet down low but like a little bark once in a while! From idle to 1 3 throttle you can barely tell this is not a stock muffler. In the mid range, you will notice a nice deep tone a little louder than stock. When you hit higher RPM this muffler has an exceptionally good tone without being obnoxious. This muffler has a special thermal barrier and internal packing that keeps it very cool on the outside.