Prepare your semi to be Ready for the Road Ahead™, with the Donaldson Round Primary Air Filter that ensures phenomenal engine protection to keep your system running at its best. Thanks to its specialized collection system, this replacement air filter is the ideal solution to clean the air of dirt, dust, and contaminants, while optimizing vehicle performance. Crafted with durable and innovative materials to reduce how often each filter should be changed. FleetPride is your First Click in Heavy Duty®.