Spark Plugs

Info provided by Calvin of Nivlac57 Youtube Channel

I have found that Ecoboost V6 plugs interchange with the Atlas engine. It appears that Gen V LT engines might interchange with Vortec 4200s as well.

The Spark plug that I like to use for our turbo cars is NGK LTR6IX-11 PN6509. I am only familiar with the NGK part numbering. What you need is the T series plus that have the extended thread. If I could find a copper plug with similar heat range, I would use that. I normally gap them to .025".

If you really plan to push the boost, a LTR7IX-11 PN6510 may be a good idea.

For high horsepower stuff, I like these plugs: https://www.ngk.com/ngk-93400-r7448a-8-racing-plug