Moose Racing Top End Gasket Kit. Performance set designed for a piston replacement. Includes every gasket, O-ring and seal required to rebuild a top end; valve seals, head, base, exhaust, tensioner, and other miscellaneous gaskets and O-rings. Made in the U.S.A. Notes: Does NOT include formed rubber valve cover gasket. Image for reference ONLY. Kit contents WILL VARY by application.