Amazing sound...

 

Sounds like they replaced the cats and maybe even the muffler with straight pipes. Awesome to hear, but I bet it'd get old really quickly if you had to live with it!

 

Very similar to what mine sounded like with the valves open before we made it more civilised with a 4.3 back box and better valve switching
That would be a PITA over any distance with out any switching IMHO
Probably a decat and back box