Ensure your semi is Ready for the Road Ahead™ with remarkable engine protection to keep it at its best, with the Donaldson Primary Obround PowerCore® Air Filter. 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. Built with resilient materials and innovative technology to extend service intervals and reduce how often each filter should be changed. FleetPride is your First Click in Heavy Duty®.