Denso (5731) IXU01-27 Iridium Racing Spark Plug， (Pack of 1)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>0.4 mm iridium center electrode: world's smallest diameter that maximizes firing potential</li><li>100% platinum ground electrode</li><li>Burnished nickel plating for superior corrosion resistance</li><li>Burnished nickel plating for superior corrosion resistance</li></ul></div><img src="http://ecx.images-amazon.com/images/I/315fyAzKTZL.jpg" noproxy>