Vertex Top End Gasket Kit Polaris Big Boss/ Sportsman / Trail Boss 350 Vertex's top-end gasket kits are crafted for the essential task of piston replacement, featuring all the necessary gaskets for a top-end rebuild including head, base, exhaust pipe, and power valve gaskets. For multi-cylinder setups, the kit comes equipped with all components needed to rebuild each cylinder, ensuring a comprehensive solution for maintenance and upgrades. Features: Designed for piston replacement Include the head, base, exhaust pipe and upper end gaskets including valve seals Gaskets and o-rings for power valve rebuild also included Multi cylinder machines include enough components to rebuild all cylinders Does not include formed rubber valve cover gaskets Note: Formed rubber valve cover gaskets are not included.