NGK 4344 LTR5IX-11 Spark Plug (Iridium IX) (pack of 4)

Exactly what it said it was

After having spoken with original manufacturer I have learned that Amazon is NOT a distributer and these are fakes.Unfortunately my return window closed 5 days ago. I just want anyone interested to know that these are bootlegitems, I am extremely glad I found out before installing them in my high performance car.

I hit just over 70k and my truck was not running well at all (16mpg highway, on a good day, HORRIBLE idle, etc). I trolled the 355nation.net forums and saw people recommending Iridium plugs, but I couldn't find the specific plugs they mentioned in stock locally, and on Amazon I couldn't find anyone that had enough stock, so I thought I'd give these a try.I've driven just over 700 miles on them so far -- the truck idles *far* smoother than it did, and acceleration is better. I don't think the engine computer has fully adjusted yet, as it idles a bit high, but I'm told that will sort itself out as time passes. Highway MPG was just under 18mpg on my last tank, so I think things are headed the right direction now. :)

We have three larger vehicles, Dodge Ram 4.7 Liter, Dodge Ram 8 Liter, and a Ridgline 3.5 liter. I upgraded all the plugs in all the vehicles to Iridium and they run noticeably better, livelier, and no misses. I have not check mileage but am sure it will improve.

These came gaped all over the place, ranged from .4 to 1.1...bought a gaping tool so that I didn't damage the iridium to set correct gaps and just put them in so can't comment on mileage