Enhance the functionality and aesthetics of your engine with the MITZONE Black Aluminum Valve Cover Set, designed to fit 1997-2004 E150 Expedition Navigator models with 5.4L V8 engines. The set includes a gasket, mounting hardware, and an oil filler cap, ensuring a comprehensive solution for your engine maintenance needs. Crafted with a durable matte black finish, this valve cover set not only offers a sleek appearance but also serves as a functional upgrade. The aluminum construction ensures longevity and heat dissipation, while the included performance part number 004-394 confirms its value in enhancing your vehicle's capabilities. Please note, this product is manufactured in China and carries a California Prop 65 warning for cancer and reproductive harm.