The Cat Auxiliary Engine Air Filter is the last line of defense against dust, dirt and other contaminants, preventing them from damaging the components of the machine that generates your revenue. The auxiliary is responsible for protecting the engine when the coarse filter is replaced or when the coarse filter breaks, and it plays a key role in preventing damage to the machine from contaminants.
Manufactured from durable materials and meeting Caterpillar's stringent specifications, these air filters deliver the consistent quality and reliability Cat users have come to rely on. Because uptime and cost-effective maintenance are critical, Cat air filters are specially designed to protect and optimize the performance of Cat equipment.
Cat Genuine Coarse Filter Elements and Auxiliary Filter Elements work in tandem to cost-effectively maintain engine integrity and extend equipment uptime on the jobsite.

Characteristics:
- eco-friendly
- Increase airflow and reduce blockages
- Playing a vital spare filter role