NGK Racing spark plugs are designed with extreme use in mind and meant to withstand the most grueling racing conditions. NGK Spark Plugs have been powering racing champions and can be found in every racing venue throughout the world. The center electrode of the NGK Racing spark plugs has special configurations and designs to ensure durability and ignitability. NGK Racing plugs bring ultra high performance in a variety of heat ranges. Special configurations are used for a wide variety of racing applications.

This Part Fits:

Year	Make	Model	Submodel
1948-1964	Harley-Davidson	FL	Base
1971-1974	Harley-Davidson	FX Super Glide	Base