Elevate your heavy-duty engine's performance with the Donaldson primary air filter. Engineered with high-efficiency cellulose media, it excels in a wide array of demanding applications. The corrosion-resistant steel liners, specially coated for added durability, provide critical support during operation, maximizing airflow efficiency. The innovative Pleatloc feature ensures consistent pleat spacing, preventing media from bunching, and ensuring a longer service life. This filter adheres to ISO 5011 standards, measuring 14.88 inches in length, with an inside diameter of 3.98 inches and an outside diameter of 7.32 inches.