This is an exhaust pipe. It routes exhaust gases from the engine through the vehicle’s exhaust system. Pro Gear and Transmission sells this exhaust pipe as a part for shops and fleets looking to replace the original Freightliner component with a compatible fit.Interchanges:Freightliner 04-23273-007WA912-09-4271FeaturesExhaust pipeDesigned to replace the original equipment tailpipePart sold by Pro Gear and Transmission