The Freightliner Replacement Elbow is a practical solution for replacing the OEM part number 04-21016-009. With a 5-inch diameter, this replacement elbow is designed to fit seamlessly and efficiently. Sold individually, it offers a cost-effective option for maintaining your Freightliner. Its reliable construction ensures durability and long-lasting performance. Upgrade your vehicle with this high-quality replacement part and experience improved functionality.