Quote:
RN12YC Champion plugs. Have Champions for eons and not had a problem with them. They Have been the OEM plugs on Mopars for as long as I can remember and I have been involve with Mopars for 40 + years.
 I've used RN12YC and RN14YC plugs on my 318's and 360's with no problems.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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