NGK (2315) LZTR6AIX-13 Iridium IX Spark Plug, Pack of 1 You can depend on NGK for quality and reliability Constructed from durable material Fine Iridium tip ensures high durability Features superior anti-corrosion and anti-seizing properties Iridium alloy has extremely high melting point, perfect for today&#8217;s high-tech, high-performance engines