Get your semi Ready for the Road Ahead™ with tremendous engine protection to keep it at its best, with the Donaldson Primary Konepac™ Air Filter. Due to its ability to clean the air of dirt, dust, and other contaminants, this replacement air filter system is the ideal solution to optimize vehicle performance. Constructed with innovative materials and modern technology to extend service intervals and reduce how often each filter should be changed. FleetPride is your First Click in Heavy Duty®.