The Haldex Remanufactured CoreFree Air Dryer Cartridge helps to protect your air system from corrosion and rust by removing moisture and contaminants from the air. It is designed to fit AD-9 air dryer applications and is easy to install. With its superior performance and reliability, this air dryer cartridge is the perfect choice for your air system. FleetPride is your First Click in Heavy Duty®.