Denso (5381) IWF27 Iridium Power 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>U-groove and taper cut ground electrode: provides faster spark flame growth and lessens heat quenching</li><li>DENSO patented 360 degree laser welding process: ensuring exceptional quality bond and structural strength with the iridium center electrode</li><li>DENSO patented 360 degree laser welding process: ensuring exceptional quality bond and structural strength with the iridium center electrode</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41L8EdBx-mL.jpg" noproxy>