Hi, I also have 2011 Ram 1500, 5.7 Hemi and I am interested to know what type of spark plugs are you using? I am about to change mine and I was looking for a more durable plug that will save me from replacing often. I have a terrible back and having to replace it pains me. My research shows that Iridium type of plugs might be the one I'm looking for based on this good article readread. It may costs a few bucks compared to a regular copper but I am willing to spend a little just to save my back pain. My question is in the real world scenario, if this iridium type of plugs is worth it in terms of performance and durability.