There are no substitutes when it comes to keeping engine-powered outdoor power equipment healthy. Briggs & Stratton genuine parts are specifically designed to exact OEM standards, manufactured and tested to help deliver optimum performance on Briggs & Stratton engines. With genuine Briggs & Stratton OEM parts, you can help extend the life and performance of your outdoor power equipment. Genuine Briggs Stratton Cylinder Head. Fits most 401000, 405000, and 406000 Briggs Stratton Engine Models.