Prepare your semi to be Ready for the Road Ahead™, with the Donaldson P628326 Primary RadialSeal™ Air Filter that provides clean and fresh air. This replacement air filter system traps dust, dirt, and other contaminants before they enter the interior of a vehicle, leading to cleaner air and a more comfortable environment. 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®.