NGK (7164) TR55IX Iridium IX Spark Plug， Pack of 1<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Designed specifically for the performance enthusiast， Iridium IX offers extreme ignitability， improved throttle response and superior anti-fouling</li><li>The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect</li><li>Longer insulator nose prevents fouling， the corrugated ribs on insulator prevents flashover， and a triple gasket seal eliminates combustion gas leakage</li><li>Iridium alloy has extremely high melting point， giving it high durability to heat and electrical wear， perfect for today's high-performance engines</li><li>Trivalent metal plating has superior anti-corrosion and anti-seizing properties</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31fAfUgipmL.jpg" noproxy>