I am currently using FRPP 3V0's, which are copper (great for higher cylinder pressure for nitrous, blowers, turbos) and they are one heat range colder. They really helped my car run better with the blower as the crappy stock platinum plugs would simply blow out from the extra cylinder pressure and misfire occasionally. The copper 3V0's cured this 100%.
I am currently using FRPP 3V0's, which are copper (great for higher cylinder pressure for nitrous, blowers, turbos) and they are one heat range colder. They really helped my car run better with the blower as the crappy stock platinum plugs would simply blow out from the extra cylinder pressure and misfire occasionally. The copper 3V0's cured this 100%.