Air Filter Kit 479-8989 479-8991 for Caterpillar CAT C7.1 C4.4 Excavator 320 320GC 323 335 Motor Grader 120AWD 120MAKE TYPE MODEL Caterpillar Excavator 320 Caterpillar Excavator 320 GC Caterpillar Excavator 320 GX Caterpillar Excavator 323 Caterpillar Excavator 323 GC Caterpillar Excavator 323 GX Caterpillar Excavator 323 OTHER Caterpillar Excavator 325 Caterpillar Excavator 326 Caterpillar Excavator 326 GC Caterpillar Excavator 333 GC Caterpillar Excavator 335 Caterpillar Excavator E320 Caterpillar Excavator E320 GC Caterpillar Excavator E323 Caterpillar