Direct Port Nitrous kit

That is a plate system...not so much a direct port.

I would not hesitate to get a plate setup like that actually. It keeps the fuel from having to travel the upper intake so it is VERY hard to get the "fuel drop off puddle issue". You can run a larger shot due to the lower intake that has generaly much straighter passages to the cyl.

A direct port will generally have a nozzle at each intake runner that has a line going to a distribution block...needless to say they are a bit complex in setting up and tuning over a plate or single nozzle setup.