yea, i gapped my vpower #9's @ .030 and they are good. I bet the iridiums could go for .034 or so. My car seems to do ok on the ignition side.

 

Ya I bought some BKR8EIX plugs and stock gap is 0.032, I an running a 300 ish CTSC setup and my tuner said these are the ideal plugs and to leave them at stock gap. Gapping an iridium plug is a baaad idea.

Im not sure how high a heat range8 plug is good for...

 

So these should not be regapped? Do they have a tendency to break off when regapped?

 

I use them for my 360hp setup, works great.

 

I also run BKR8EIX's. They come pre-gapped around .030" and have performed very well for me.

 

BKR8EIX
Ideal gap is .33 which is close enough to how they come.
I would not try to gap them.

 

Yes DO NOT try to gap these, would suck having the tip break off in the engine.

 

sweet im glad to see pregap is perfect.