Having watched several videos of 6TH Gens with Delkevic, Two Brothers, GPR and the like exhausts and slip-ons, I believe that the Two Brothers slip on or system sounds sweet! Now, aside from the lack of gear whine, does the TBR system or slip-on sound like that because of the single can? Most of the double can offerings sampled on YouTube sound similar with the exception being Staintune systems. As a caveat, who knows the recording conditions of either video and the impact on the quality of the sound. I guess the TBR sounds more or less like a 5TH without the gear whine though a little agricultural all the same. Is it the single can making that bliss or just video technique or lack of using a good mic and gain structure on the other videos?