Exhaust shroud extension for Peterbilt 388 and 389 models 2007+. These exhaust shield filler panels are for the rear exhaust. For use with GMX4457/GMX4457L/GMX4457R. Not to be used on 389 models with 36″ sleepers. The exhaust shroud extension features ovals and are sold in pairs.
For ordering information, please visit your local Peterbilt dealership.