High-quality iridium spark plug with a heat value of 6.Long life compared to traditional copper candles! Reliable operation in both factory and tuned engines!Its main characteristic is the special iridium electrode. Thanks to the high material density of iridium, it is a good electrical conductor and can withstand very high temperatures (iridium's melting point is 2446 degrees Celsius).Spark Plug size: 21mmAdvantages:- reliable arc ignition- high ignition intensity- almost 100% utilization of air and fuel- reliable ignition in all operating conditions (cold and hot)- engine flexibility and performance improves and increases- engine operation becomes stableWe recommend for the following models:For more seriously modified versions of the Mitsubishi Lancer EVO 4-5-6-7-8 with at least 300 horsepower for competition purposesIf you have the proven spark plug, but you can't find it on the webshop, then contact us, we will definitely be able to get it for you!