Caterpillar 9S-9972 9S9972 Engine Air Filter

$ 65.79
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  • Availability: In Stock
  • Product Sku: 9S-9972-1Pack
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Standard Efficiency Engine Air - Secondary

It pays to choose genuine Cat® Filters to protect the iron that generates your income.

Cat Secondary Engine Air Filters are your last line of defense against dust, dirt and other contaminants that may damage the components of your income-producing machinery. Tasked with protecting the engine while the primary filter is being changed or in the event of a breach in the main filter, this secondary unit plays a critical role in preventing damage due to contaminants.

Constructed of durable materials and manufactured to meet Caterpillar’s stringent specifications, these air filters deliver the consistent quality and reliability that Cat owners count on. Because uptime and cost-effective maintenance are critical, Cat Air Filters have been specifically designed to protect and optimize the power of your Cat iron.

Working together, genuine Cat Primary and Secondary Filter Elements provide a cost-effective method for maintaining your engine’s integrity and increasing your equipment’s uptime on the jobsite.

  • Environmentally friendly
  • Increased airflow with less restriction
  • Serves the critical role of back-up filtration


Efficiency Rating: Standard Efficiency
Primary vs Secondary: Secondary
Seal Type: Axial Seal


Earthmoving Compactor
815B 816B

Motor Grader
12G 130G 140G 14G 160G

Wheel-Type Loader
936 936E 936F 950B 950B/950E 950E 950F 966D 966E 966F G936

Engine - Generator Set
3208 3304 3304B

Paving Compactor
CP-643 CP-653 CS-643 CS-653

Track-Type Skidder

Wheel Dozer

571G 572G

Engine - Industrial
3208 3304 3304B

Track-Type Loader
943 953

Track-Type Tractor
140 141 143 5 55 56 56H 57 57H 5A 5P 5S 6 6A 6S 6SU 7 7A 7S 7SU 7U D3B D3C D5 D5H D6D D6H D6H II D6H XL D6H XR D7F D7G D7H

* All fitment filter part numbers are based on your engine serial number.
* Please confirm with our team if you are unsure this filter will fit your engine.