Fair enough, maybe being a true dual helps with the flow? I get a bit of rasp with my Nismo, but nothing too bad once it heats up.
The berks will also soot up after a few 1000 miles which will help with the rasp.
I think being true dual definitely helps with flow so could be why I didn't get any noticeable rasp, ...or my hearings f**ked.
The sound always settles down after exhausts/Cats etc bed in which for some people is a blessing & others find it disappointing.