Er, there are no such things as carbon air ducts on an ST !
The air inlet comes through the centre of the fairing and the only bit of the air box you can see is if you lift the tank up...
Your better bet would be to fit a DP airfilter & cut away airbox cover. Boy does it make the bike sound loud when riding it - I have to wear ear plugs else it sound like your going to be sucked down the throttle trumpets !!
If you fit carbon belt covers, keep a check on the mounting bolts as they have a habit of vibrating loose...