Those are the only plugs that are gapped that way and those are Ford plugs that are "equivalent" to the OE plug, however they should be gapped to the OE spec, not what they come as. The equivalent idea is that they use the same threads, same heat dissipation, same electrode design and similar materials. However, they should still be gapped to the OE spec.
Apr 18, 2022 at 8:02 PM