NGK Racing Spark Plug Box of 4 (R7440A-10L)

The center electrode on these NGK Racing spark plugs features special configurations designed for durability and ignitability, making them ready for the most demanding racing conditions. NGK has a long history of powering champions across various racing venues worldwide. These plugs are built to handle the harsh engine environments found in competitive motorsports.

You'll find these NGK Racing plugs offer ultra-high performance across a variety of heat ranges, thanks to their specialized designs tailored for different racing applications. The pure alumina silicate ceramic insulator offers superior strength and efficient heat transfer, while special insulator nose configurations help improve throttle response. Additionally, the trivalent metal plating provides excellent resistance to corrosion and seizing, making installation and removal much easier. Triple seals are incorporated to prevent any leakage.