ok, I did try to do as much homework on spark plugs....so please read on.
all this talk about NGK iridium vs platinium plugs and where to get them etc. my question is...do you have to pre-gap the plugs prior to installation? and if so, whats the size?

hope someone can elighten me.
thanks

 

Usually platinum and iridium plugs are already pregapped. The recommended gap size is 0.43.

 

thanks!