Peterbilt 388 Deck Plates & Air Line Boxes Deck plates and air line boxes are essential components for Peterbilt 388 semi-trucks, providing both functionality and style. This product lineup offers a wide selection of durable, high-quality options to outfit your Peterbilt rig. From smooth aluminum and diamond plate deck plates in various sizes to recessed air line boxes with convenient trailer air, 7-way, and hydraulic hookups, you'll find everything needed to customize the underneath of your truck. These components not only protect critical systems but also enhance the overall aesthetic with a polished, professional look. Whether you're hauling heavy loads or want to showcase your Peterbilt's capabilities, the products in this product lineup will deliver the perfect blend of form and function. Upgrade your 388 with top-notch deck plates and air line boxes for an exceptional driving experience and standout style on the road.