Thank you for the inquiry.
Plugs these days come pre-gapped. They use part numbers to tell the gap in them.
My suggestion would be to switch over to the Bosch 4419's. If you've looked at the Bosch plugs you would see they have 4 ground electrodes on them I think the would be bear to gap. They come pre-gapped and it even says so right on the little spark plug box. You can purchase Bosch 4419's at the local Auto-zone Store and save a bunch of money. You will not regret the performance.
Kind regards,
TF
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local AutoZone store and purchased the Bosch 4419's
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