Upgrade your Peterbilt 357, 378, or 379 with our fiberglass fender side skirt. Available for both left and right sides, this product is a direct replacement for OEM part numbers 15-05181L and 15-05181R. With pre-drilled holes and the same shape and look as the original, installation is a breeze. Made in the U.S.A., this product fits most Peterbilt 357, 378, and 379 makes and models. Enhance the practicality and appearance of your truck with this high-quality fender side skirt.