Manufacturer's Part Number:
Summit Racing Part Number:
Spark Plug Indexing Block Included:
Spark Plug Indexing Block Material:
Spark Plug Indexing Block Finish:
Illuminated Spark Plug Viewer Included:
Spark Plug Gapper Included:
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High compression engines with dome pistons require indexing of spark plugs to prevent contact between the piston dome and the ground wire of the spark plugs. These indexers are designed for both flat and taper-seat 14mm spark plugs. With their hex head design, it makes them easy to be held in a vise.