9 Inch Diameter Muffler With Built In Y-Pipe For Peterbilt 378, 379

01-080200 - BESTfit Exhaust Y-Pipe With Muffler Fits Peterbilt * Made Of High Quality Steel * 5 Inch Length With 9 Inch Muffler * Sold Individually * Made In USA * Warranty On Exhaust Pipes Against Defects In Workmanship & Material From Date Of Purchase. ***High Quality Aftermarket Replacement Part (Not OEM)*** * This Item Is Special Order. This Item Will Not Be Able To Be Canceled And Is Non-Returnable.