MBRP trail can.  This was on a 2022 Ski Doo 850 e-tec.  The sled has only 300 miles on it so the can is like new.  I believe that this fits the Gen-4 sleds from 2017 to 2023.  Some  of those later models has the stock muffler O2 sensor at the bottom of the can and some have it near the top.  If your stock can has it near the bottom then you will need the sensor extension cable.  (not included)  I found it easily on line at Ski Doo Parts Nation for $31 part number NO2X-1201.  If your stock muffler has the O2 near the top already then you have no need for an extension.  I priced this $100 less than I see new MBRP cans sell for.