Best spark plugs

[swshawaii]

Umm, how do you know there has never been a complaint?

I should have said "never READ of a single complaint in terms of performance." Not entirely correct though.
Although rare, I've heard of defective MC plugs right out of the box, but that could happen with any brand.

 

[bluestream1]

what are the best plugs to install in my 98 explorer v-6 SOHC ?

It all depends on what you want...Best price? Best longevity? Best performance?