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  iSaveTractors Replacement Cylinder Head for Kohler K241, K301, K321, M10, M12, M14 10HP, 12HP, and 14HP Cast Iron Single Cylinder Engines and Magnum Engines. This is a stock replacement and is modeled after the original 4th generation cylinder...

This is the ultimate engine restoration kit for Kohler K90, K91 4HP Cast Iron Engines with Magneto Ignition Systems.   It includes everything you need to make your engine run like brand new again!   There is no other rebuild kit available...