Mike1

Does anyone bother to gap them ( if so what gap for a stage 3 Sierra ) or just bung them in as out the box?

BigErn

I had my plugs gappet at 0.6mm on my stage 3 Sapph, worked a treat.

Mike1

Cheers Big Ern

Wonder why they changed the outer electrode shape from the 701 to 071? Presume it's going back to the old "side-gapping" thing people used to do so the spark present a bigger area to the mix.

Is this why they don't last as long as the older 701s?

Mike1

Also, do Ford ( Motorcraft ) make their own plugs or are they produced by someone else?