I just got off the phone with NGK to find out what plug they would use in the Lightning. They told me that if the truck was @ stock boost they would use TR6 (stock#4177) and if I upped the boost any they would use B7EF (stock#3346).

Does this sound right? Thought I had the TR7 plugs in my truck but was told that they do not make them. Will need to look at them when I get home.

Need to change the plugs soon as I am getting a little pinging. Had this before (with the old motor) and changed the plugs the problem went away.