Get more utility from your Peterbilt 379 truck with aftermarket deck plates and air line boxes. Organize, protect and store your air hoses and electrical wires in one, easy-to-reach spot with air line boxes. Choose from recessed or surface-mounted air line boxes with features like trailer air, electrical hookups, and customizable lighting options. All boxes are weather-resistant and durable, offering a lot of long-term value! Our deck plate products range from sleek billet aluminum step plates available in a variety of sizes and finishes, to sturdy in-frame and flush-mount deck plates made from durable aluminum or stainless steel. Our deck plates and air line boxes provide practical storage and wiring access points. Need step plates? These come in popular sizes and colors to match your truck's unique aesthetic. Browse through various design elements like flanges, radius bottoms, and multiple hookup options created with functionality in mind.