Product Details: Ensure your semi is Ready for the Road Ahead™ with a clean and contaminant-free fuel line, with the Fleetguard FF5971NN Spin-On Fuel Filter. 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. FleetPride is your First Click in Heavy Duty®.