Spark plugs for 2016 season

My Dart Sport will be getting colder spark plugs this year as per NGK's advice. I used to run the GR4 with the V groove but this year I am going with the Iridium GR5iX stock No 7214. I guess 350 HP deserves a colder plug. Let's hope they live up to their write up.

So this year: new plugs, wires and a different console. Still searching for an 8.25 locker or posi.

I run the Iridium plugs in my daily driver Dakota. I really like them a lot, I used direct replacement, I didn't go colder or hotter.
You will notice a difference with the new wires and plugs.

I contacted NGK directly and that is what they suggested. I have nearly 100 HP over stock.