NOTE: This complete Vertex Gasket Set contains all parts as 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. One kit containing all of the gaskets O-rings and valve seals necessary to rebuild the entire engine and transmission. Includes transmission seals. Fits: Yamaha WR450F 2019-2021 YZ450F 2018-2019 YZ450FX 2019-2021