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$31.32
$25.37
Holley 558-420 Terminator EFI Input/Output Kit
Holley 558-420 Terminator EFI Input/Output Kit

Holley 558-420 Terminator EFI Input/Output Kit

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Holley 558-420 Terminator EFI Input/Output Kit
Holley 558-420 Terminator EFI Input/Output Kit
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We estimate this item will ship on or before December 18th.
Part # 425558420
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Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 2 business days for Holley to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.

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GTIN Code:
090127688519

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HolleyDAYS are here again! SAVE up to 20% on this part and hundreds of other Holley brands during the 2018 HolleyDAYS sale 11/15/18-12/31/18.

PN 558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain. It contains Input wires for Inputs 1-4. It contains one wire for Output 2. These inputs and outputs can perform features and functions that must be programmed via Holley EFI laptop software. The software also contains instructions on how to program these.

Installation Instructions (PDF)

Some parts are not legal for use in California or other states with similar laws/regulations

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