Upgrade your Peterbilt 389 with our Sleeper Extension Panels, designed for 63-inch sleepers. Available in widths from 3 to 10 inches, these stainless steel panels add both style and functionality to your truck. Sold individually, these extension panels are a practical and easy way to customize your rig. With a one-part design, they fit most Peterbilt 389 makes and models, making them a versatile and convenient addition to your truck. Enhance the look and comfort of your sleeper with these durable and sleek extension panels.