There are 3 products.
NGK Standard Spark Plugs The workhorse, at the heart of smooth-running engines around the world. OEM Quality Triple-Gasket sealing process Consistent performance Plug of choice in millions of vehicles Sold individually
NGK Iridium IX Spark Plugs The only spark plug that serious enthusiasts rely on. Designed specifically for the performance enthusiast. NGK Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Fine Iridium tip ensures high durability and a consistently stable spark Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines Trivalent Metal Plating - superior anti-corrosion and anti-seizing...
NGK Laser Iridium Spark Plugs Laser Iridium spark plugs provide superior ignitability and long service life. Smallest tip diameter available Iridium / Platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions Laser welded Iridium center electrode tip Platinum disc welded to backside of ground electrode provides long life Trivalent Metal Plating for superior anti-corrosion and anti-seizing...