Get your semi Ready for the Road Ahead™ with tremendous engine protection to keep it at its best, with the Donaldson Primary Obround PowerCore® Air Filter. This replacement air filter system traps dust, dirt, and other contaminants before they enter motor, leading to cleaner air and enhanced 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®.