We have a few things available for the 800 XP. We have a single pipe, a Y pipe, and a single muffler for trail riding. Each of these will bolt on the stock components as well as with each other. There is no need for any jetting changes when you install one or a combination of any of the exhaust parts. The pipe is available for 0-3000' elevation or h/a above 3000' please specify when ordering. The expected horsepower gains with the single pipe is 3-4, and the Y-Pipe is 3. The muffler is a weight savings and sounds like the stock muffler. All parts are available in ceramic coated, or high temperature black paint. We also have a billet head with removeable domes. The trail mod kit includes, trail porting customers cylinders, single pipe, y-pipe, v-force reeds, and a billet head with domes. Kit is available in ceramic coating or just painted black.