- Home
- 86-93 Mustang GT/LX/Cobra
- EFI Engine Management
- 558-400 Holley Input/Outputs Auxiliary Harness for Terminator X, HP and Dominator
Holley EFI
558-400 Holley Input/Outputs Auxiliary Harness for Terminator X, HP and Dominator
- SKU:
- HLY-558-400
- UPC:
- MPN:
- 558-400
- Shipping:
- Calculated at Checkout
MSRP:
Now:
$110.95
Was:
— You save
Frequently bought together:
Description
Great for applications requiring minimal Input/output wiring. 4 Output Wires 4 Input Wires
Connector J1A/B Inputs/Outputs Auxiliary Harness for Terminator X, HP, and Dominator EFI systems
Related Products
Related Products

Holley EFI Universal MPFI Main Harness For HP and Dominator EFI, 558-104
Holley EFI
MSRP:
Now:
$485.95
Was:
Universal MPFI Main Harness for HP EFI & Dominator EFI
HLY-558-104


Anderson Fox Body Gen 3 EFI Main Harness for Holley HP, Dominator, Terminator X and X Max
Anderson Ford Motorsport
MSRP:
$744.95
Now:
$729.95
Was:
A TRUE plug and play EFI main harness for your Fox Body Mustang and Holley EFI. This harness is used in the Anderson Gen. 3 Terminator X and Dominator complete kits.
This main harness has...
AF-128F

558-401 Holley Dominator EFI Auxilary Harness for Second Wideband
Holley EFI
MSRP:
Now:
$210.95
Was:
Used when adding a second wide band oxygen sensor to a Dominator EFI installation. For use with Bosch 4.2 and NTK wideband sensors.
Features:
J2A Connector
#2 Wide band oxygen sensor harness...
HLY-558-401

Holley EFI Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI, 558-308
Holley EFI
MSRP:
Now:
$90.74
Was:
Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI
HLY-558-308

558-443 CAN to USB cable for Holley EFI, Terminator X
Holley EFI
MSRP:
Now:
$73.85
Was:
The CAN to USB communication cable provides the user with real tuning time access to the ECU. This cable can be used with Holley EFI, Sniper EFI, and Terminator X Tuning Software. Which can be...
HLY-558-443


Holley CAN Splitter Harness for Terminator X / Sniper EFI
Holley EFI
MSRP:
Now:
$42.18
Was:
The Holley EFI CAN splitter allows you to add an additional CAN device to your Sniper EFI or Terminator X installation, without needing to unplug the handheld. This easy to install CAN splitter...
HLY-558-465

Holley EFI Ford EV1 V8 Injector Harness, 558-209
Holley EFI
MSRP:
Now:
$230.95
Was:
Ford V8 Injector Harness for HP EFI, Terminator X & Dominator EFI, have EV1 Injector connectors
HLY-558-209

554-157 Mustang ECU Bracket for Holley HP, Terminator X, X-MAX
Holley EFI
MSRP:
Now:
$96.27
Was:
Holley EFI ECU mounting brackets, allowing you to safely mount your ECU under the seat of a Foxbody Mustang.
Easy Installation of Holley HP, Terminator X, or Terminator X Max ECU in Your...
HLY-554-157

558-212 Holley EFI Ford Fuel Injector Harness for EV6/USCAR Injector Connectors
Holley EFI
MSRP:
Now:
$172.95
Was:
Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced)
Works with Holley EFI systems Terminator X, X Max, HP and Dominator main harnesses.
Eliminates the need for...
HLY-558-212