The Peterbilt 579 Def Catalytic Lower Step Cover in Wing Style is a practical and beneficial product for Peterbilt 579 models. Made of stainless steel, it is durable and long-lasting. Each cover comes with brackets and hardware included, making installation hassle-free. This lower step cover not only enhances the appearance of your vehicle but also provides protection and functionality. With its wing style design, it fits most Peterbilt 579 models seamlessly. Upgrade your truck with this reliable and stylish step cover today.