Can someone verify for me that the 4.7L has a 2.5" exhaust and that there is a resonator in the system?

 

You can look in the passenger side rear wheel opening and see the resonator just aft of the centerline of the axle, and the muffler is upstream of that. As far as the pipe size goes on a 4.7L, I'm not sure. The Hemi is 2.5" though.