Secondary Air Filter Element for Caterpillar | Part 9S-9972

Ensure the ultimate protection for your engine with the Caterpillar Secondary Air Filter Element (Part No. 9S-9972). This element is specifically designed to serve as a high-reliability back-up filtration system, protecting the engine intake while the primary filter is being serviced or in the event of a main filter breach.

Constructed for Standard Efficiency filtration, it is a critical component for high-value machinery operating in heavy dust environments like construction, mining, and agriculture. It is commonly used in CAT 3208 and 3304 engine series found in loaders, graders, and tractors.