These ROADWORKS Peterbilt 379 Cowl Extensions are a practical and durable addition to your truck. Made of stainless steel, they are built to last and come blank, ready for customization. Sold in pairs, they fit most Peterbilt 379 models and come with a 1-year warranty from Roadworks. The louvers provide added ventilation and style to your truck, making it stand out on the road. Upgrade your truck with these cowl extensions for a sleek and functional look.