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Holley

Holley LS Extended-Length Main Engine Harnesses 558-133 Wiring Harnesses, EFI, LS1/6, 24X/1X, Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 4.8-6.0L, Each

SKU: HLY558-133

Wiring Harnesses
Holley LS Extended-Length Main Engine Harnesses 558-133 Wiring Harnesses, EFI, LS1/6, 24X/1X, Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 4.8-6.0L, Each

Holley

Holley LS Extended-Length Main Engine Harnesses 558-133 Wiring Harnesses, EFI, LS1/6, 24X/1X, Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 4.8-6.0L, Each

SKU: HLY558-133

Wiring Harnesses
A$1,852.66
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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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 18:48:00

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
558-133
Product Attributes - Part Type
Wiring Harnesses
Product Attributes - Product Line
Holley LS Extended-Length Main Engine Harnesses
Product Attributes - UPC
090127140758
Product Attributes - Harness Length
Extra-long
Product Attributes - Fuse Block Included
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Designed for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.

Reference Information

Brand Name/s Holley
StreetFX SKU hly558-133
SFX Item ID 4782798
Supplier Item Code 4782798
Manufacturer SKU 558-133
Manufacturer UPC 90127140758
Alternative References HOL558-133, LS1/6, 24X/1X, 4.8-6.0L

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel Injection ConfigurationHolley Dominator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel Injection ConfigurationHolley HP EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel Injection ConfigurationHolley Terminator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel Injection ConfigurationHolley Dominator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel Injection ConfigurationHolley HP EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel Injection ConfigurationHolley Terminator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel Injection ConfigurationHolley Dominator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel Injection ConfigurationHolley HP EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel Injection ConfigurationHolley Terminator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel Injection ConfigurationHolley Dominator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel Injection ConfigurationHolley HP EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel Injection ConfigurationHolley Terminator EFI
    Wiring Harness ClassificationEngine
    Application NotesDesigned for use on 24x, 1x, 58x, and 4x LS engines. This harness interfaces with 24x crank and 1x cam sensors. 22 in. extended length allows to mount ECU in a variety of locations, such as roll bar or under passenger seat.

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