Head Gasket Kit / Kohler 24 841 01-SPack Size:1Kohler 24 841 01-S, Kohler 24 041 08-SJ. Thomas KH-04108, NHC 24 841 01-SKohler CH18-CH25; for 18 thru 25 HP enginesEthanol: Not compatible with greater than 10% ethanol fuel, Kit services 1 cylinder