Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The NGK Racing spark plug is engineered for extreme competition, with center electrode geometries and heat-range options suited to demanding racing use. Built to maintain ignitability and resist harsh engine conditions, these plugs include trivalent plating for corrosion and seizing resistance, alumina-silicate ceramic insulation for strength, corrugated ribs to prevent flashover and a copper core to help dissipate heat during sustained high-load operation.
NGK Racing Spark Plug Box of 4 (R7440A-10L)
