spark plug brand

i keep mine under 9 just cause i dont have the balls to go higher my dad will take it up there though:LOL: problem is i bury that 8 grand tach:LOL:

In the race car only NGK,in my street cars AC Delco.I tend to stay away from any of the multi-tipped plugs or platnium plugs for the race car.

I've had decent luck with delco's, so I stuck with them.