I've just completed searching the forums for recommendations on what brand and p/n spark plugs to install in my '09 R/T w/ the 5.7...car is stock except for CAI. My last Dodge, an '06 Charger R/T, I replaced plugs at 30,000 miles since the book said so and went back with the standard Champion copper ones, which seemed to be fine. That was several years ago and I wondered if we were still looking at the same thing or if someone found a much better option....run better and last longer, would be nice! Thanks for your help!!