NGK SPARK PLUG CR7E 4578NGK Spark Plug CR7E (4578) Key Features: Wide Heat Range: Copper wire dissipates heat more quickly than iron cores found in conventional plugs, improving engine performance. Efficient Cooling: The copper core helps cool the electrode and insulator tip, ensuring consistent performance. Raised Pre Ignition Rating: High conduction copper and a long nose insulator provide a raised pre ignition rating for better reliability. Durable Construction: NGKs

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Not only do they come with polarised Emerald mirror lenses