Kohler GM62347 Maintenance Kit for 17/18/20 kW Residential Generators Go to amazon.com Related posts Top 10 best generator 20kw Feature1 Air filter1 Pre-cleaner1 Oil filter3 Quarts of synthetic oil2 Spark plugs DescriptionKohler- GM62347-SKP1-QS Maintenance Kit 17-20 kW17RES, 18RES & 20RES