Denso R-P11 Iridium Long-Life Spark Plug

Closely related to platinum and exhibiting even tougher qualities, the rare metal iridium is an ideal material for spark plugs. The DENSO Iridium Long Life plug was specifically designed for long service life and consistent performance in the latest, most advanced production cars. A fine-wire, 0.7mm iridium center electrode is 360-degree laser welded in place using an exclusive DENSO process, then matched to a platinum ground electrode. This pair of precision-formed, premium-metal electrodes dramatically extend the plug's useful life. The DENSO Iridium Long Life plug has been selected as original equipment on many of the world's top cars, including those from GM, Toyota, Honda, and Mitsubishi. There's a simple reason for that: these manufacturers needed the best.

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