For anyone who is looking for some new aftermarket accessories for their Tracer, they should check out Crescentmoto. They've got everything from cases, side sliders, tail tidy's and even full exhaust systems. The Akra system seems to be one of the most common mods for this bike.
The majority of FJ07 pictures I've seen seem to have that Akra exhaust, so I guess a lot of people are getting it installed prior to taking delivery. Even most of the review articles are using a model with this setup.