2 Air Filters Plus 2 Pre-Filters For Kohler 17 883 03-S1, 17 083 03-S, 17 083 21-S, 17 083 15-S 2 Quality Aftrmarket Air Filters and 2 Pre-Filters. Air Filters Replaces Kohler 17 083 03-S, 17 083 21-S Pre-Filters Replaces Kohler 17 083 15-S Air Filter Plus Pre-Filter Combo Part Number Is 17 883 03-S1 ID: 1-5/8", OD: 3", Height: 4-3/8"