Installed 18" resonators. Its so quite now
!!
But on the plus side it sounds better! When the pipe was really cold above 4k there was a little rasp. Also down shifting and stuff there was a gargle and now there is neither. I was going to wait to install them but I know test pipes would have only made it worse so now when I get test pipes ill be able to see if I need two more resonators installed in the TS.