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LS1 Main Harness

LS1 Main Harness
Brand: Holley
Model 558-102
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Availability: In Stock
Price: $309.00
   - OR -   

This LS1 main harness makes connecting the Holley ECU to your LS1 a breeze! It plugs directly into the Holley ECU and then provides direct-fit connections for the stock sensors, including:

  • Manifold Air Pressure
  • Throttle Position Switch
  • Coolant Temperature Sensor
  • Crank Sensor
  • Cam Sensor
  • Stock Ignition Harness (Even/Odd)
  • Idle Air Control
  • Manifold Air Temperature

Other connectors are included that are direct-fit for the following Holley sensors, available separately:

  • Fuel Pressure Sensor
  • Oil Pressure Sensor
  • Wideband Oxygen Sensor
This harness is included as part of the HP EFI ECU and Harness Kit, GM LS1 (550-602). A complete schematic of this harness is available in the Holley EFI Wiring Manual and Diagrams.

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Tags: 558-102,