If the same as the Classic 9T, the DB killers at the end of the silencer are easily removable (just a few screws) but the silencer internal baffles would at least need the rivets drilled out to be removed, perhaps they are even internally welded as well.
I drilled out the rivets on the cans and had a meticulous machine shop pull the end caps off w/o damaging the finish on the stock cans. You need a Dremel type saw to remove the metal screening a bit at a time. Some of it will remain. II replaced the rivets and now have completely hollow cans. Believe it or not, it's not super loud until you are at highway speeds with flapper wide open. I personally like the way the sound bounces in the stock cans prior to exiting.
I just took the end caps off today and found this to be true..... I also like the stock sound, but I was hoping to get the killers out to get MORE of that sound!!!! Oh well, I guess I'll just have to live with it.