<ul> <li>Iridium center electrode firing pin provides exceptional ignitability</li> <li> 360 degree continuous laser welded center electrode provides unmatched resistance to thermal shock that can occur in today's high performance engines</li> <li> Copper core provides broader heat range to resist pre-ignition and fouling</li> <li> Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize - saving time</li> <li> Factory-set pre-gap ensures ease of installation</li> </ul>