The ktec one utilises some original pipe work in order to draw in cold air.
Unless you’re using it on track, I really wouldn’t bother on a road car, as all you’ll do is make everything rattle.
There is patches of bonded deadening dotted around the car, but I think most of the noise suppression comes from the foam under the carpets.
A simple way of getting some more volume inside, is to drop the rear seats