The Roadworks Peterbilt 388 Narrow Cowl Extension is a practical and versatile product designed to enhance your truck's functionality. Made from durable stainless steel, this extension is blank, without light holes, and is sold in pairs. It fits most Peterbilt 388 makes and models, making it a versatile choice. It is specifically designed to fit trucks with a set back DPF and passenger side Kenworth style box. However, it does not fit trucks with a set forward DPF or 388 low profile trucks. Upgrade your truck with this reliable and functional cowl extension.