Everything I've read says that the Hemi's do better (or at least the same) with the cheap copper plugs. Heck, the non-copper plugs used by the guy who started this thread caused him problems. I know I'm using the copper plugs and they are fine. On the other hand, I don't drive my truck that much, so 30k miles is a long time between spark plug changes!

joe

 

How fast did he do it? i did my wires also and it took me a little over an hour and a half for everything, a big improvement compared to the first time i did it which was over 3 hours

 

I did my plugs and used th NGK V-Power, Gapped, Anit-Sieze, Dialectric grease......Smooth as can be. I did not remove the tire either, you can get at all of them from the top. Seems like more work to remove the tire to me.....whatever. On the 03's do they not have coil packs? just wondering about the wires? My 06 has coil packs so no wire changes for me....

 

03's have the coil packs going to the main spark then off of that connects a wire and runs to the offspark of another cylinder. i think they only kept the design for a couple years so i'm sure it wasnt that great or they would have kept it...