• Holley Sensors & Harnesses 558-501 Item Image
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Holley EFI

Holley GM 58X EFI Harness Kit

Holley GM 58X EFI Harness Kit

sku: 1D69U | mpn: 558-501
$1,106.34
$1,106.34
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Low stock: 4 left

Emissions

This is not an emissions item.
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An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system!

Features:
  • Harness Kit Includes; Main Power Harness, LS2 Main Harness & LSX Injector harness
  • Simple Installation
  • Works with HP or Dominator ECU's
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