Autolite 666 Nascar Performance Copper Core Spark Plugs are a set of four spark plugs designed for high-performance and custom fitment in cars and trucks. These spark plugs have a copper core and are new old stock, meaning they are unused and in their original packaging. The Autolite brand is known for producing quality spark plugs, and the 666 model is specifically designed for NASCAR racing.

New old stock

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