The Surbo is fitted replacing the air intake snake or nozzle whichever you want to call it. The air intake housing inlet nozzle will be fitted with an adapter so that the Surbo and it's housing can be fitted perfectly.
This will also prevent the Surbo and housing from falling off while driving around.
As can be seen from the picture above, there is a black thing holding the Surbo housing into the air intake filter inlet nozzle. That is a cable tie. Just to tie things up so that it will not fall off while on the road.
Thanks to the car owner for this great photos.