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Holley EFI Terminator X LT Main Engine Harnesses 558-129 Wiring Harnesses, EFI, Gen V, Engine, Harness, for X, Max, ECU Only, Chevy, 5.3L, 6.2L, Each

SKU: HLY558-129

Wiring Harnesses

Holley EFI Terminator X LT Main Engine Harnesses 558-129 Wiring Harnesses, EFI, Gen V, Engine, Harness, for X, Max, ECU Only, Chevy, 5.3L, 6.2L, Each

SKU: HLY558-129

Wiring Harnesses
A$1,432.36
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Terminator X standalone engine management systems offer performance at a budget price with plug-and-play operation. For use with these ECUs, Holley EFI Terminator X LT main engine harnesses are available to make connecting and servicing your system easier. Choose the one designed for your application.

Part Type

Wiring Harnesses

Data: v4.2 - Upd: 2026-10-21 14:09:06

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
558-129
Product Attributes - Part Type
Wiring Harnesses
Product Attributes - Product Line
Holley EFI Terminator X LT Main Engine Harnesses
Product Attributes - UPC
90127140802
Product Attributes - Harness Length
Standard
Product Attributes - Fuse Block Included
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
This harness is designed for use with Terminator X and X Max ECU's only.

Reference Information

Brand Name/s Holley
StreetFX SKU hly558-129
SFX Item ID 4783916
Supplier Item Code 4783916
Manufacturer SKU 558-129
Manufacturer UPC 90127140802
Alternative References HOL558-129, 5.3L, 6.2L

Compatibility

Application Data
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2014
    Ending Year2020
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size5.3L/325
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2014
    Ending Year2023
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2015
    Ending Year2023
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2018
    Ending Year2020
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2019
    Ending Year2023
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size5.3L/325
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2019
    Ending Year2023
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2020
    Ending Year2023
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size6.2L/376
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2020
    Ending Year2023
    Engine FamilyCHEVY SMALL BLOCK GEN V V8 GAS
    Engine Size6.6L/401
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo
  • Application NotesThis harness is designed for use with Terminator X and X Max ECU's only.
    Beginning Year2023
    Ending Year2023
    Engine FamilyCHEVY LT6 V8 GAS
    Engine Size5.5L/333
    Engine TypeV8
    MakeCHEVROLET
    UniversalNo

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