Prepare your semi to be Ready for the Road Ahead™, with the Donaldson P551311 Spin-On Secondary Fuel Filter that maintains a clean and contaminant-free fuel line. With a specialized design, this replacement fuel filter protects the fuel injection system by screening harmful particles before the fuel is combusted in the engine. Manufactured with sturdy materials to endure demanding conditions and expand the interval time between each component change. The air conditioning and heating system in heavy duty trucks has a major impact on drivers’ safety and comfort level. Whether you are looking for A/C compressors, condensers, driers, freon, or blower motors, FleetPride has the part you need to make sure your air conditioning and heating are well maintained. Keep your heavy duty fleet operations working as productively and efficiently as possible by finding the right air conditioning and heating part for you. FleetPride is your First Click in Heavy Duty®.