Yes. K1= probably the loudest exhaust for a zed, barring no exhaust at all. add decats, even louder still!
Ask Bennett if he still has any hearing left - I think hes running the setup you describe and i'm pretty sure small children's heads explode when he drives past.
See I drive mine daily with bungs out and it really doesn't bother me, although I may have already gone deaf from it lol. But I wanna know just how much louder it will be with decats whether I can live with it or not!