Don't assume that the -11 on the end of the standard plug number is the same code that is used on your four electrode plug. It might be, then again, it might not.

Actually, since electricity follows the path of least resistance, & will therefore fire across to only one of the side electrodes, I don't really see the point of this design.

I'll swear by the Platinum or Iridium plugs because the very fine center electrode seems to concentrate the 'jumping off' point for the spark & as I have said before, will fire across a given gap at a given compression pressure with a lower voltage.
This means that the same voltage will fire across a larger gap than a standard type of plug & with a high energy ignition you should be able to open the gap up quite a bit & get something that starts to approach a welding arc.

Well, OK, that might be an exaggeration, but you get the picture.