NGK Iridium Racing Spark Plug Box of 4 (R7437-9)

The fine wire center electrode on this NGK R7437-9 spark plug is crafted from an iridium alloy, which has an extremely high melting point. This makes it well-suited for the intense heat and demands of racing applications where stock plugs might struggle. NGK has a long history of powering champions, and these plugs are built to handle grueling conditions, ensuring durability and consistent ignitability when you need it most.

Beyond the iridium tip, the plug features a pure alumina silicate ceramic insulator. This material offers superior strength and helps manage heat transfer effectively, which is crucial for performance engines. The trivalent metal plating on the threads provides excellent resistance to corrosion and seizing, making installation and future removal much easier. Triple seals are also incorporated to prevent any gas leakage, ensuring the plug functions as intended under pressure.

This box contains four R7437-9 spark plugs, designed for racing use. If you're building or maintaining a high-performance engine for track use, these NGK plugs offer a well-built option designed to withstand extreme operating temperatures and deliver a stable spark.