Standard Efficiency Engine Air Filter - Secondary 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. Attributes: Environmentally friendly Increased airflow with less restriction Serves the critical role of back-up filtration SPECIFICATIONS Height (in): 15.25 Length (in): 30.9 COMPATIBLE MODELS Wheeled Excavator M325B Paving Compactor CS-573E CS-683E CS-563E CS-583E CS-563D CS-583D CP-563D CP-533D CS-531D CP-563E CS-533D CS-663E CP-663E CP-573E CS-573D Excavator 320E L 321C 323D2 L 320D RR 320C 321D LCR 320D2 323D S 323F L 323F OEM 320D2 GC 320D 320D FM 323E SA 323D L 325B L 320D LN 322C FM 320B LL 320D2 L 320D L 321B 320B FM LL 322B L 320F L 320C FM 320D2 FM 323F 320B L 320B 320E 322C 323F SA 323D 320B U 320D3 320B N 323D LN 323F LN 320D LRR 320B LU 322B LN 320D GC 320D FM RR 320E LRR 320E LN 320C L 320B S 320E RR 323D SA 325B LN 323E L 323E LN 322B 323D3 325B