We finally got a set of Torq Loopz on our own F6B. They are installed with a set of Rush Mufflers with the 2.25" Baffles.
You will instantly notice the deeper sound. The sound still levels off at quite a lower rate at cruising speeds.
When you get on it, you will notice a pretty good bark with the Rush Mufflers. I really did not notice drone before with the 2.25" baffles, but my son noticed a little compared to his new Valkyrie, that is not there now.
The sound is somewhat like my old Valkyrie now, but much more refined.
The heat is gone from the Catalytic Converters.

I would strongly suggest these if installing after market mufflers, you will get the true sound that you are looking for.
We also have gotten very good feedback from everyone installing these with stock mufflers.