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ACCEL Spark Plug Indexer
The Accel Spark Plug Indexing Tool takes the guess work out of installing your spark plugs. High compression racing engines with wedge style heads demand indexing of spark plugs to prevent contact between the piston dome and the ground wire of the spark plug. This amazing tool helps the professional engine builder do just that!
Initially the cylinder head must be removed to properly index the spark plug
Once a given plug is selected (placed in a cylinder head and found to have the correct ground wire position), it is placed in the Indexer and the position of the ground electrode marked on the black anodized surface
This mark then provides a reference for checking other plugs to be used in the same cylinder
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