NGK CPR6EB-9 - Spark Plug - Single/-- 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