I recived a set as well, there are three spark "gaps" - center electrode to
ceramic metal ring, metal ring to metal ring, and metal ring to ground
(threads). I haven't put them in yet, mainly because I need a set of
spacers (coming) to fit them. Glad to hear, though, that they do the
things you say, as that is all they should do. I remember a thread a while
ago about plugs and it turned into a "technical" war, lasting days on who
could phrase there sentences right, let's not do that again. Has anyone
else tried these plugs? I can't wait to. BTW how was your off-idle
response? could you tell a difference?