Review on Walker 21471 Muffler by Guerdon Draper

This was mainly made to reduce the exhaust temperatures in my 2007 Cummins Ram 2500 due to its straight through design. It's a little louder than I was hoping, but nothing obnoxious. The big test will be when we hook up our fifth wheel and power down a long incline to see if we can live with the extra noise or not. But I think that should be ok.