The ROADWORKS Peterbilt 379 Cowl Extensions are a practical and reliable solution for truck owners. Designed with louvers, these extensions are sold as a pair and are a perfect fit for the Peterbilt 379 truck model. With a 1-year warranty from Roadworks, you can trust in the quality and durability of these cowl extensions. Enhance the functionality of your truck while adding a sleek and stylish touch. Upgrade your Peterbilt 379 with these extensions and experience the benefits of improved airflow and protection.