Elevate your engine's performance with the Donaldson primary air filter. Crafted with high-efficiency cellulose media, it excels in a wide range of heavy-duty applications. The filter's corrosion-resistant, coated steel liners provide crucial support during operation, maximizing airflow for optimal performance. Thanks to the innovative Pleatloc feature, pleat spacing remains consistent, preventing media from bunching and ensuring a longer service life. This filter, measuring 4.06 inches in length, with an inside diameter of 11.63 inches and an outside diameter of 13.88 inches, adheres to ISO 5011 standards.