I recently installed the Mopar cat-back system on my Laramie and found that it has not been documented that much.  It's fairly new and I could only find a few short videos when researching.  Here is a video that has clips of some of the scenarios I was curious about when trying to decide if I wanted it.  Starting, cruising at different speeds (with or without radio on), accelerating at different rates, ECT.  This system has the Carven tips instead of the OEM or Mopar ones.  I felt like the sounds changed slightly with the larger tips, but that may (probably) be me just trying to justify the extra cost.
Headphones recommended.  I'm a novice at recording audio and it seems the recorded volume was low at times.