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This is only used on applications using a CD Box, such as an MSD 6AL, while not using timing control.
Holley EFI Tach Input Ignition Adapter - 558-302
$25.22
Product Specifications:
- Product Details: Tach Input Ignition Adapter
- Harness Type: Ignition
- Ignition Type: CD Ignition (No Timing Control)
- Part Type: Ignition Harness
- Product Type: Ignition Harnesses
Installation Notes:
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.