The Peterbilt Retro Kit Replacement Y Pipe is a practical and reliable solution for replacing the Y Pipe in the Peterbilt Retro Kit (PRK-6). With a 5-inch outer diameter, it fits perfectly in Peterbilt 359 and 379 makes and models. Available in both Chrome and Aluminized, this Y Pipe is sold individually. Its high-quality construction ensures durability and longevity. Upgrade your Peterbilt truck with this replacement Y Pipe for improved performance and functionality.