Holley EFI Tach Input Ignition Adapter

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Overview This is only used on applications using a CD Box, such as an MSD 6AL, while not using timing control. Plugs into the connector labeled “IGNITION” on the main harness. The Loose yellow/black lead connects to the “Tach Out” terminal of the ignition box. Caution: Never connect this wire directly to the Ignition Coil Show more