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- Holley EFI Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI, 558-308
Holley EFI
Holley EFI Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI, 558-308
- SKU:
- HLY-558-308
- UPC:
- MPN:
- 558-308
- Shipping:
- Calculated at Checkout
MSRP:
Now:
$90.74
Was:
ā You save
Frequently bought together:
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Holley EFI Universal MPFI Main Harness For HP and Dominator EFI, 558-104
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MSRP:
Now:
$485.95
Was:
Universal MPFI Main Harness for HP EFI & Dominator EFI
HLY-558-104
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558-401 Holley Dominator EFI Auxilary Harness for Second Wideband
Holley EFI
MSRP:
Now:
$235.00
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
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Holley Dominator EFI ECU, 554-114
Holley EFI
MSRP:
Now:
$2,299.95
Was:
DominatorĀ® EFI Vehicle Management Systems are intended for all engine applications, from street to unlimited high-end racing applications. In addition to the transmission control, drive by wire, and...
HLY-554-114
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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
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Anderson Fox Body EFI Main Harness for Holley HP, Dominator, Terminator X and X Max
Anderson Ford Motorsport
MSRP:
$692.95
Now:
$685.95
Was:
AF-128F
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558-108 Main EFI Harness, 99-04 Ford Modular
Holley EFI
MSRP:
Now:
$750.95
Was:
Main harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines.
For Terminator X, X Max, HP and Dominator EFI systems.
(Main engine harness only)
HLY-558-108
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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

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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
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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