GSE Performance Arctic Cat Wildcat Trail Sport Performance Muffler/Air Filter Combo The next best thing to dual exhaust without the high cost This GSE Performance muffler increases power, acceleration & throttle response  add our high flow air filter and you will feel even more throttle response and see an increase in fuel mileage There is no fuel controller needed with this muffler / filter combo This muffler does not come with spark arrestors but we do have them available