Elevate your heavy-duty engine's performance with the Donaldson primary air filter. Crafted with high-efficiency cellulose media, it excels across a diverse range of applications, ensuring top-tier performance. The corrosion-resistant, steel liners, coated for enhanced durability, provide essential support during operation, maximizing airflow for optimal engine function. The innovative Pleatloc feature ensures uniform pleat spacing, preventing media from bunching and extending the filter's service life. Compliant with ISO 5011 standards, this filter measures 14.4 inches in length, with an inside diameter of 4.44 inches and an outside diameter of 7.8 inches.