Got to admit, having commuted a couple of times on the new CT, I am definitely getting a noisier exhaust !
I have a Beowolf and the F8GS and a twin port Blueflame on the Blackbird and when I'm slowly filtering cars do hear me and generally move out of the way (maybe the HID Headlights help as well!) but yesterday while tootling between the cars even I couldn't hear the exhaust !
So, another safety feature to be fitted, pity there aint too much choice at the moment tho cos I aint paying for an Akro !
LeoVince seem ok and they are a sensible price so a bit more research needed !!