you have a 4.4 right man?

I would just replace with OE NGK plugs, no performance gains but your motor will like fresh plugs if you are near 100k.

Did mine on my M54 this summer (I have 70k now) and the plugs were definitely aged a bit after 10 years, she starts much nicer and idles a bit smoother, and no soft codes for misfires anymore either.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards