Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI

Part #: 558-308

Brand: Holley EFI


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This Harness is required with HP or Dominator ECUs. Includes, 13' long, 10 AWG main power harness, Qty. (2) 3/8" ring terminals and shrink tube (not pictured) . The harness is fuse protected and covered in braided split loom for additional abrasion protection .

Main Power Harness

Part #: 558-308
  • Length: 10"
  • Width: 11"
  • Height: 3.5"
  • Emissions Code: 3
  • Prop 65: No
Installation Notes:

The Main Power Harness MUST be connected directly to the Battery terminals. Do not connect them to any other location such as a disconnect switch, starter solenoid or distribution lug. The harness length is 13 feet. If you need to extend the length do so with 8 AWG or larger multi-strand wire.