Review on 🔌 Champion Copper Plus 439 Spark Plug: High-Performance Pack of 4 by David Cronin

They arrived well packaged and in their original boxes. I replaced my old spark plugs with a 2nd generation Durango with a 4.7 liter V8. I checked them all before installing. Even though they are pre-approved, some of mine weren't up to spec. So do yourself a favor and prepare the gap and adjust accordingly. For installation I have included a picture using dielectric grease and copper based anti-seize grease. I only apply a minimal amount of anti-seize to some of the center threads on the connectors. Helps to remove them easily next change. I also apply dielectric grease to the coil packs around the o-ring to ensure a good seal. After I installed all 8 it lit up and sounded fantastic. No misfires. Happy with my purchase. Great plugs!