I'd beg to differ on whether or not that is a panhard bar or not under the strict interpretations of a php being a bar that prevents side to side movement of the axle.
However, the point which I'll make for the THIRD time is that the most commonly sold kit for these trucks includes that bar. The installation of that bar makes it hard as heck to install an exhaust.
Call it whatever you want. All I was trying to point out was the various pitfalls of options that are out there.