Genuine Caterpillar Filter 6I-2501 comes with IHD Strap wrench. Designed to the exact specifications of your Cat equipment, genuine Cat Filters are a crucial factor in your machine’s ability to use air efficiently. A clean filter element protects internal mechanisms from being damaged by dirt. Cat Standard Efficiency Primary Engine Air Filters are your best value for normal duty applications, delivering increased engine protection and preventing equipment downtime. * 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.