Outfit your semi to be Ready for the Road Ahead™ with superior engine protection to keep it at its best, with the Donaldson Primary RadialSeal™ 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. Engineered with durable materials and efficient technology to extend service intervals and reduce how often each filter should be changed. FleetPride is your First Click in Heavy Duty®.