Spark Plug Index Washer Set – Precision Engine Tuning Kit

Description

Have you ever looked at a spark plug and noticed one side is clean and the other is rich or dirty? You need to index, or align the direction of the electrode for more efficient combustions, and higher peak RPM’s.  For 14mm thread spark plugs.  Kit comes with 25 washers, 5  each of 5 different sizes.

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