Elevate your engine's performance with the Donaldson primary air filter, a pinnacle of engineering excellence that meets ISO 5011 standards. Crafted with high-efficiency cellulose media, it excels across a wide spectrum of heavy-duty engine applications. The corrosion-resistant, coated steel liners offer steadfast support during operation, ensuring maximum airflow and performance optimization. The innovative Pleatloc feature maintains uniform pleat spacing, preventing media from bunching and extending the filter's service life. At 25.98 inches in length, with an inside diameter of 8.39 inches and an outside diameter of 12.76 inches, this filter delivers a precise fit for various systems, making it an indispensable choice for discerning users.