Outlaw Racing OR3794 Complete Full Engine Gasket Set WR450F '07-14 YZ450F '06-09 Kit Exactly what you need to get your bike rebuilt and running right! Each kit will contain the exact gaskets, seals, and o-rings you need to re-assemble your top and bottom engine components after a standard rebuild. Require no trimming or modification! Our gaskets are made to exact OEM specs but with better materials, such as Stainless Steel, Fluoroviton, and Teflon. Keeps your bike running stronger!