Outfit your semi to be Ready for the Road Ahead™ with superior engine protection to keep it at its best, with the Donaldson Blue® Primary PowerCore® 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®.