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Main Harness Input/Output Upgrade, Terminator -11%
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Main Harness Input/Output Upgrade, Terminator

PN 558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain..

$54.36 $48.32

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Main Harness, 99-04 Ford Godzilla 7.3L New -11%
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Main Harness, 99-04 Ford Godzilla 7.3L

EFI Main harness for the Ford Godzilla 7.3L Engines. Note that two different ignition connector styl..

$520.95 $462.95

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Main Harness, 99-04 Ford Modular -11%
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Main Harness, 99-04 Ford Modular

Main harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines. Note that two differen..

$844.95 $750.95

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Main Harness, Gen III Hemi w/Early Crank/Cam Sensors -11%
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Main Harness, Gen III Hemi w/Early Crank/Cam Sensors

Check the alternate image above to see the difference between the early and late cam and crank senso..

$871.95 $774.95

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Main Harness, Gen III Hemi w/Late Crank/Cam Sensors -11%
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Main Harness, Gen III Hemi w/Late Crank/Cam Sensors

Check the alternate image above to see the difference between the early and late cam and crank senso..

$826.95 $734.95

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Main Harness, LS1 / LS6 -11%
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Main Harness, LS1 / LS6

This harness is designed for Chevy LS and late-model truck engines that have a 24-tooth crank sensor..

$653.95 $580.95

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Main Harness, LS2 / LS3 / LS7 -11%
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Main Harness, LS2 / LS3 / LS7

This harness is designed for Chevy LS and late-model truck engines that have a 58-tooth crank sensor..

$653.95 $580.95

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Main Harness, Multi-point / Stealth Ram -11%
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Main Harness, Multi-point / Stealth Ram

If you need to replace one of the Holley Stealth Ram system harnesses, or if you are building a stea..

$653.95 $580.95

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Main Harness, Terminator -11%
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Main Harness, Terminator

Replacement main wiring harness for Terminator EFI kits 550-405 and 550-406...

$518.95 $460.95

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Main Harness, Terminator TBI, LSx, 24 Tooth Crank Sensor -11%
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Main Harness, Terminator TBI, LSx, 24 Tooth Crank Sensor

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$722.95 $641.95

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Main Harness, Terminator TBI, LSx, 58 Tooth Crank Sensor -11%
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Main Harness, Terminator TBI, LSx, 58 Tooth Crank Sensor

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$735.95 $653.95

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Main Harness, Universal Multi-Point -11%
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Main Harness, Universal Multi-Point

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$546.95 $485.95

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Main Harness, Unterminated Universal -11%
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Main Harness, Unterminated Universal

If you are looking at this harness then you are obviously forced down a difficult road! You may wan..

$546.95 $485.95

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Main Power Harness for Terminator/Avenger/HP/Dominator ECUs -12%
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Main Power Harness for Terminator/Avenger/HP/Dominator ECUs

Power Harness for Holley Avenger, HP, and Dominator ECUs..

$102.95 $90.75

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MAP Sensor Adapter, LS1/LS2 to LS3 MAP Sensor -11%
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MAP Sensor Adapter, LS1/LS2 to LS3 MAP Sensor

Holley LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor..

$41.50 $36.89

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