NGK MR8CI-8 / 96973 Iridium Ignition Spark Plug

The NGK MR8CI-8 / 96973 Iridium Ignition Spark Plug sets a new standard in durability and ignitability. Featuring the smallest tip diameter in its class and an OE-grade iridium center electrode, this plug delivers faster starts, stable idle, and reduced fouling for smoother engine performance. A laser-welded iridium tip paired with a platinum ground electrode offers exceptional wear resistance, extending service life even under demanding driving. The trivalent metal plating provides superior corrosion and anti-seize protection, while the design supports better fuel economy and lower emissions. With an OE-approved construction and standard gasket sealing, it’s built to meet or exceed original specifications while supporting reliable ignition across a wide range of engines.