Upgrade your Peterbilt 379 with these louvered cowl extensions from ROADWORKS. Sold as a pair, these extensions are designed to fit your truck model and come with a 1-year warranty for added peace of mind. The sleek design not only enhances the look of your truck but also provides practical benefits. These cowl extensions are a practical and stylish addition to your Peterbilt 379, making them a must-have for any truck enthusiast.