Peterbilt 387 Frame Crossmembers & Covers - Essential Components for Structural Integrity and Customization The Peterbilt 387 is a popular semi-truck model known for its durability and versatility. This product lineup features a wide range of essential components that help maintain the frame's structural integrity and allow for personalization. From rugged aluminum crossmembers to stylish fiberglass rear covers, these products play a crucial role in protecting the truck's frame while also enhancing its appearance. Whether you're in need of replacement parts or looking to upgrade your Peterbilt 387, this product lineup has the high-quality, reliable options you can count on. Discover top-of-the-line frame components that combine strength, functionality, and customization to keep your rig performing at its best.