Holley Terminator® EFI Wiring Harness | GBP Performance
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Holley

Holley | Terminator® EFI Wiring Harness

558-420
Holley | Terminator EFI Auxiliary Wiring Harness 558-420 | 4 Extra Inputs + 1 Output, 205 lb/hr Injector Harness | Holley EFI Software Required
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Holley – Terminator EFI Auxiliary Wiring Harness

Description

The Holley Terminator EFI Auxiliary Wiring Harness (p/n 558-420) supplements the base Terminator EFI harness with 5 additional input/output wires: 4 input wires (Inputs 1-4) and 1 output wire (Output 2). These connections enable advanced features and functions that must be programmed using Holley EFI laptop software. A 205 lb/hr injector harness is also included. The Holley EFI software provides complete instructions for programming all additional inputs and outputs, making this an essential upgrade for users requiring expanded system control.

Specifications

  • Brand: Holley
  • Part Number: 558-420
  • Type: EFI Auxiliary Wiring Harness
  • Extra Input Wires: 4 (Inputs 1-4)
  • Extra Output Wires: 1 (Output 2)
  • Injector Harness: 205 lb/hr included
  • Programming: Required via Holley EFI laptop software
  • Compatibility: Holley Terminator EFI systems – Not vehicle specific
  • Condition: New
  • Sold and shipped by GBP Performance

 

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Compatibility (Application)

MakeModelYearsEngineNotes
Compatible with Holley Terminator EFI systems – Not vehicle specific
Holley
558-420
90127688519

Data sheet

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