NGK LMAR8BI-9 / 91909 Iridium Ignition Spark Plug

The NGK LMAR8BI-9 / 91909 Iridium Ignition Spark Plug delivers superior ignitability and long service life with the smallest tip diameter available. Its iridium/platinum surfaces ensure slow wear, providing stable idle and robust anti-fouling performance. A laser-welded iridium center electrode tip paired with a platinum disc welded to the backside of the ground electrode delivers extended life and consistent sparks under demanding conditions. Trivalent metal plating enhances anti-corrosion and anti-seizing properties for smoother maintenance. Expect faster starts, quicker acceleration, and improved fuel economy with lower emissions. This OEM-approved design features a 14 mm spanner size and a 26.5 mm thread length, standard gasket sealing, and is suitable for a wide range of modern engines. Always verify compatibility with your vehicle’s specifications before ordering.