What kind of plug are you guys running in your 400? What are these Iridium plugs all about?? And what are they worth, also where can you get them?? I have some new pics I will be posting later this week, went through some DEEP water, almost up to the seat (river crossing) and NO sputtering. The Grizzlies we were with were sputtering a bit though[img]i/expressions/face-icon-small-sad.gif[/img]