Originally Posted by bmrisko
Do you mind posting here as well so it is available publicly for other members who may eventually search this topic?
I went searching on the forums before this post and noticed NEK went with an iridium plug. I asked him why he went with iridium 9055 plugs.. Not the difference between the three choices I have above. The reason people go with iridium is longer lasting, meaning less labor costs and less spark plug costs overtime. However I had read the Hemi's are sometimes picky and don't like anything but OEM. Here is NEK response below regarding the Iridium 9055 Champ plugs he is running..
"The OE plug is a NGK and of copper construction. The price between copper and premium plugs times 16 pieces is quite a difference. That's why OE went copper. The Champion 9055 Iridium has a 7 year unlimited mileage warranty. Going to the Iridium will save the labor charges for 4-5 installations of copper plugs. Can't say as I've seen any siginificant performance or mileage to date."