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Holley EFI Input/Output Harness (J1A/B)

Holley EFI Input/Output Harness (J1A/B)

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Holley Part #: 558-400

Use this harness to tie your inputs and outputs into your Holley EFI unit.

Each harness has eight-pin connectors with loose wires on the other end to make your connections to.

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