The Freightliner Replacement Exhaust Extension is a practical solution for replacing the OEM part number 04-23273-007. With a 3.5-inch diameter, this exhaust extension is designed to fit seamlessly and enhance the performance of your Freightliner. It is sold individually, making it a cost-effective choice for replacing your exhaust system. Improve the efficiency and functionality of your vehicle with this reliable and durable replacement.