The Freightliner Replacement Elbow is a practical solution for replacing the 04-21016-002 model. With a 5-inch diameter, this replacement elbow fits seamlessly into your existing setup. Designed to replace the OEM part number, it offers a reliable and efficient solution for your freightliner needs. Each unit is sold individually, ensuring you have the exact quantity you require. Upgrade your freightliner with this high-quality replacement elbow, providing a seamless fit and optimal performance.