I just changed the plugs in my 2010 Dodge Charger, 3.5 Police package. I am amazed my car even ran, no missing, no roughness at all and always started. I am guessing the are the original plugs, NGK ZFR5LP-13G with about 185,000 KM. The plug gap is supposed to be .051, they are around .120. Have a look at this pic.
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