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Holley

Holley LS Extended-Length Main Engine Harnesses 558-134 Wiring Harnesses, EFI, LS2/3/7, 58X/4X, Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 6.0-7.0L, Each

SKU: HLY558-134

Wiring Harnesses
Holley LS Extended-Length Main Engine Harnesses 558-134 Wiring Harnesses, EFI, LS2/3/7, 58X/4X, Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 6.0-7.0L, Each

Holley

Holley LS Extended-Length Main Engine Harnesses 558-134 Wiring Harnesses, EFI, LS2/3/7, 58X/4X, Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 6.0-7.0L, Each

SKU: HLY558-134

Wiring Harnesses
A$1,852.66
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

Holley LS extended-length main engine harnesses are 22 in. longer than previous harnesses. Designed to fit most 24x and 58x LS engines from 1997-2012, they are a perfect fit for installers wanting to mount any Holley EFI ECU inside of the passenger compartment where it is away from the elements, and easy to access, such as on a roll bar or under the passenger seat.

Notes:

* Plug-and-play with Dominator, HP, Terminator X, and Terminator X Max ECUs
* LS1/6 harness interfaces with 24x crank and 1x cam sensors
* LS2/3/7 harness interfaces with 58x crank and 4x cam sensors

Part Type

Wiring Harnesses

Data: v4.2 - Upd: 2026-10-13 18:46:54

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
558-134
Product Attributes - Part Type
Wiring Harnesses
Product Attributes - Product Line
Holley LS Extended-Length Main Engine Harnesses
Product Attributes - UPC
090127140765
Product Attributes - Harness Length
Extra-long
Product Attributes - Fuse Block Included
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
For HP EFI, and Dominator EFI. For use with 58X crank LS engines.

Reference Information

Brand Name/s Holley
StreetFX SKU hly558-134
SFX Item ID 4784076
Supplier Item Code 4784076
Manufacturer SKU 558-134
Manufacturer UPC 90127140765
Alternative References HOL558-134, LS2/3/7, 58X/4X, 6.0-7.0L

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2005
    Ending Year2009
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Application NotesFor use with 58X crank LS engines.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2012
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size7.0L/427
    Application NotesFor use with 58X crank LS engines.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2012
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    Application NotesFor use with 58X crank LS engines.

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