Top End Gasket Kit. Produced in the U.S.A. with the latest materials and technology in gasket production to Vertex specifications. Vertex gaskets ensure long-lasting performance and leak prevention for your rebuild needs. Vertex's replacement gaskets and seals are available as a top end kits, complete engine kits, or as an oil seal kit. These sets include the head, base, and exhaust gaskets, valve seals, O-rings and other gaskets to complete a top end rebuild. Note: Images are for reference only, actual item and contents may vary based on fitment.