I have checked the search for this and found nothing on this plug, i bout autolight copper core 4163dp2 plugs for my 400ex, the auto store told me these were like the ngk is this true, also what grease do i need and where to apply it???

 

i would seriously try to run the stock ngk plug. I dont like autolite plugs either, i'm a mechanic and i only OEM spark plugs when possible.

as far as grease, you put the grease on the inside of the boot that goes on the top of the plug. this keeps water
from entering the boot, it also keeps the boot from seizing to the plug so the next time you take it off it wont be stuck.