Vertex Top End Gasket Kit Vertex's top-end gasket kits provide the components needed to replace a piston, be it due to catastrophe or just maintenance. These kits include head, base, exhaust pipe, and power valve gaskets suitable for a top-end overhaul. For engines with multiple cylinders, the sets come fully equipped with components to refurbish each cylinder. 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.