I'm the third owner of my '15 Sport and somewhere along the line, a previous owner performed "surgery" on the stock muffler. I could look through it and see the spark screen and tip...completely hollow and very loud. I found an OEM replacement on Ebay from an '18 Trail, installed it and and happy with how much quieter it is. You guys running stock mufflers and complaining about noise should ride in one for a few hours with a hollowed out muffler lol. Ear plugs almost required.