I have been running this setup for well over 3 years now based on my signature!!
SHOdded was the first to see my setup in person. Z
Pros-It sounds great without it being overly loud with absolutely
zero drone to the cabin.
The overall quality is by far second to none IMO..
Cons- There is a eminent,noticeable rasp only during wot,high rpm.
I would say from my personal experience that the frequency of the sound changes with ever up-loaded tune.
Here is a member which installed resonators which hawkeye93 mentioned above.