NGK

NGK Spark Plug - R6254E-9 5583

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Superior construction for serious power
NGK makes plugs for almost any type of application and riding style
Versatile plugs with wide operating heat ranges prevent fouling from running too cool and preignition from running too hot
Features include high-alumina ceramics for improved heat dissipation and electrical insulation, deep-seated copper core for a wider heat range and a nickel alloy tip for longer life