Why You Should Verify Your Brand on Social Media: A Guide to Meta Verified Vertex Top End Gasket Set KTM. NOTE: This Vertex Top End Gasket Set contains all components pictured. 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 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.