- Ignition & Electrical
- Wiring, Wiring Harnesses, Switches, Connectors, Breakers & Relays
- Holley GM Gen V LT Engine Wiring Harnesses
Wire Harnesses to Complete Your LT Engine Swap
Holley GM Gen V LT Engine Wiring Harnesses are the solution for a clean#, trouble-free LT engine swap project.
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Main Harnesses
Holley 558-129
Holley 558-129 Main Wiring Harness for GM Gen V LT Engines w/Terminator X or X Max ECU
$512.95
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Holley 558-130
Holley 558-130 Main Wiring Harness for GM Gen V LT4 Engines w/Terminator X ECU (V3 Build 100 or Later)
$512.95
Estimated to ship direct from manufacturer in 24hrs
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Sub-Harnesses
Holley 558-220
Holley 558-220 Direct-Injection Sub-Harness for Early GM Gen V LT Engines w/4-pin Fuel Pressure Sensor and a Terminator X or X Max ECU
$133.95
Estimated to ship direct from manufacturer in 24hrs
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Holley 558-221
Holley 558-221 Direct-Injection Sub-Harness for Late GM Gen V LT Engines w/3-pin Fuel Pressure Sensor and a Terminator X or X Max ECU
$133.95
Estimated to ship direct from manufacturer in 24hrs
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Holley 558-468 Drive-By-Wire Harness for GM Gen V LT Throttle Bodies and a Terminator X or X Max ECU
Holley 558-468
Holley 558-468 Drive-By-Wire Harness for GM Gen V LT Throttle Bodies and a Terminator X or X Max ECU
$252.95
Estimated to ship direct from manufacturer on 04/25/24, pending manufacturer availability.
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$252.95
Estimated to ship direct from manufacturer on 04/25/24, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee