Get your semi Ready for the Road Ahead™ with tremendous engine protection to keep it at its best, with the Donaldson Primary RadialSeal™ 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®.