I had a issue with nova plugs only lasting one 7 min heat
And arfter throwing 4 down the drain as being dead I did a last ditch effort
And put a p3 in there and no problems didn't alter the tune or any thing

Now last week I thought my x7 was faulty as I was killing plugs on run in
So now I'm thinking it was the plugs so in total I killed 8 plugs in one gallon
But as soon as I swapped both engines over to p3 no issue

I haven't had a issue up to this date with nova plugs