Air Filter For Kohler 2508302S, 25 083 02-S (outer) Plus 2508303S, 25 083 02-S (inner) Quality Aftermarket Outer Filter Plus Inner Filter. 1 Air Filter For Kohler 2508302S (outer) 1-3/4" ID, 3-1/2" OD, 7-3/8" Long 1 Air Filter For Kohler 2508303S (inner) 1-5/16" ID, 1-3/4" OD, 6-11/16" Long