I am planning on changing the muffler on my truck. I need to know what size the pipe is before the muffler? I have been told that its three inch until the muffler then comes out of the muffler at 2.5 but I am not for sure. Does anyone know for sure what size it is. I am planning on running a Flow super 44 3inch in 3 inch out single three inch pipe same location as stock. Thanks for the help guys.