Good question, Im wondering the same thing but I doubt they will. I mean dosent someone have to complain about the noise first?
I have FMF's and they do not make a hush kit. Im wondering how 90% of the people with non stock bikes will be able to ride if so? I don't think 4 strokes will be able to pass with aftermarket pipes either
As a matter of fact there is a hush kit you could put on FMF's. Its Toomey that makes them. Anyways I was at glamis for Halloween and it didn't seem like they were checking for sound tests, but let me know if you want to put a hush kit on your FMF's, i know it can be done...