Air Filter Plus Pre-Filter For Kohler 17 883 03-S1, 17 083 03-S, 17 083 21-S, 17 083 15-S Quality Aftermarket Air Filter and Pre-Filter Air Filter Replaces Kohler 17 083 03-S, 17 083 21-S Air Filter Plus Pre-Filter Combo Part Number Is 17 883 03-S1