Update your semi with supreme engine protection to keep it at its best, with the Donaldson Round Primary Air Filter that ensures you're Ready for the Road Ahead™. To provide enhanced vehicle performance, this replacement air filter system cleans the air of dirt, dust, and other contaminants before they can enter the motor. Fashioned with innovative and efficient technology to extend service intervals and reduce how often each filter should be changed. FleetPride is your First Click in Heavy Duty®.