• Holley Sensors & Harnesses 558-504 Item Image
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Holley EFI

Holley Universal V8 MPFI EFI Harness Kit

Holley Universal V8 MPFI EFI Harness Kit

sku: 1D69X | mpn: 558-504
$988.80
$988.80
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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, Universal MPFI Main Harness, v-8 Injector Harness
  • Simple Installation
  • Works with HP or Dominator ECU's
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