a set of 479-8989 and 479-8991

479-8989 (primary level) and 479-8991 (safety level) are the CAT UHE series cellular air filter kits for Caterpillar (CAT) 320/320GC/323 excavators and C4.4/C7.1 engines. They adopt Ultra High-Efficiency cellular filtration technology, with an ISO 5011 filtration efficiency of 99.99%. They are OE-level original factory components and are suitable for dusty working conditions.