I got my NGK Iriduim for my wife LX 470 and my tundra. LX specifies .044 and tundra .032. I talk to the parts counter person where i got the plugs online and ask if the plugs need to be gap. His comments are "
they are pre gap from the factory. You should not have to do anything!"
Once I got them, just out of curiosity, I check them anyway. "Just be very very very careful touch the tips of the iriduim. They are coated iriduim, and very thin and delicate!"
The LX NGK gap was off by .036 to .047.
The Tundra NGK gap was of by .028 to .035
Lesson for me. Never trust anyone!