NGK Spark Plug Stock # 4462

The NGK Laser Iridium Spark Plug IZFR6J (stock #4462) is a premium-grade spark plug engineered for reliable ignition performance across a broad range of automotive engines. This single spark plug features NGK's laser-welded iridium center electrode—a design that concentrates the spark point to a precise 0.4mm tip, maximizing combustion efficiency and extending the service life well beyond conventional copper or silver-core alternatives.

The IZFR6J is configured with a 14mm thread diameter, 0.749-inch reach length, and gasket seat sealing design—specifications that define compatibility with specific engine applications. The resistor core suppresses ignition noise and reduces electromagnetic interference, protecting vehicle electronics and radio systems. These technical details ensure that replacement ignition requires precise fitment; using the correct part number prevents fouling, misfires, and engine performance loss.

Mechanics and automotive enthusiasts select NGK Laser Iridium plugs when engine performance and reliability matter. Whether servicing routine maintenance on daily-driver vehicles or tuning high-performance builds, the iridium construction delivers consistent spark voltage and extended electrode life—reducing the frequency of replacements and supporting stable fuel economy. This is the exact replacement part for engines originally equipped with this specification.

Sold individually, this spark plug is sized and priced for single-plug purchases or small fleet applications. Cross-reference the UPC (087295144626) and NGK part number IZFR6J against your vehicle's service manual to confirm fitment before purchase, as incorrect thread diameter or reach length can cause engine damage.