I have a M8 kit for Arctic Cat M6 and M7 sleds. It comes with cylinders, head, pistions. Kit runs very strong and there are alot of these kits out there that are working well. This kit can be run with increased fuel presure or for an additional $200 I will send you a Boondockers fuel control box. I'm asking $1000 for this kit and it's a inexpensive addition to a smaller CC machine.