Denso (4503) PK16TT Platinum TT Spark Plug， (Pack of 1)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Twin-tip technology with 11 mm platinum center electrode and 11 mm titanium enhanced ground electrode</li><li>Improve fuel economy， better acceleration and faster starts than all other single platinum plugs</li><li>Purified alumina powder insulator provides exceptional dielectric strength and thermal conductivity， allowing the material to stand up to extreme stress</li><li>Purified alumina powder insulator provides exceptional dielectric strength and thermal conductivity， allowing the material to stand up to extreme stress</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31zd8d1CrGL.jpg" noproxy>