The Tecumseh 21210020 Cylinder Head is a genuine OEM replacement part designed for a wide range of Tecumseh small engines. This essential engine component ensures proper combustion and engine performance. It is compatible with various H, HH, HS, HSK, HXL, TVS, and TVXL series engine models, including H30, H35, H40, H50, H60, HH40, HH50, HH60, HS40, HS50, HSK35, HSK40, HSK50, HSK60, HXL35, HXL840, TVS90, TVS100, TVS105, TVS120, TVXL90, TVXL100, TVXL105, TVXL115, and TVXL120.