Vertex Top End Gasket Kit KTM SXF250 16-22/Husqvarna FC250 16-22/Gas Gas MC250F 21-23 Product Info: Vertex’s top end gasket kits are designed for tackling the job of replacing a piston. Each set includes the head, base, exhaust pipe, and power valve gaskets necessary for a top-end rebuild. Formed rubber valve cover gaskets are not included. Multi cylinder applications include all necessary components to rebuild all cylinders.