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On Sale
Holley LS extended-length main engine harnesses are 22 in. longer than previous harnesses. Designed to fit most 24x and 58x LS engines from 1997-2012, they are a perfect fit for installers wanting to mount any Holley EFI ECU inside of the passenger compartment where it is away from the elements, and easy to access, such as on a roll bar or under the passenger seat. Notes: * Plug-and-play with Dominator, HP, Terminator X, and Terminator X Max ECUs * LS1/6 harness interfaces with 24x crank and 1x cam sensors * LS2/3/7 harness interfaces with 58x crank and 4x cam sensors
( 1 )
$672.95
$604.95
On Sale
Holley's Terminator X and Terminator X Max ECUs give you complete control of your engine, self-learning fuel strategies, and the race-winning technology of Holley EFI at a budget-friendly price. When you need to service your system, Holley has the components that will fit and perform as expected. Holley Terminator X/X Max engine control module wiring harnesses allow you to access the inputs and outputs built into the Terminator X or Terminator X Max ECU. These harnesses have all eight pins populated, four inputs and four outputs. Features: * 36 in. flying leads * Pre-terminated at ECU connector * Eight wires * Sealed connector
( 2 )
$39.49
$35.54
On Sale
Holley EFI Dominator transmission harnesses provide control of your Tremec. The harnesses are terminated for VSS, reverse lockout, and reverse lights. Choose the one designed for your build.
( 1 )
$228.95
$206.05
On Sale
Terminator X standalone engine management systems offer performance at a budget price with plug-and-play operation. For use with these ECUs, Holley EFI Terminator X LT main engine harnesses are available to make connecting and servicing your system easier. Choose the one designed for your application.
Not Yet Reviewed
$574.95
$516.95
On Sale
If you don't feel comfortable cutting up your factory wiring or don't want to attempt to swap pins on your headlight plugs, Holley RetroBright adapters make it a plug-and-play affair. If the standard H4 male plug used on Holley RetroBright headlights will not fit your female socket or you need to swap pins around to match up properly, these harnesses will make the job quick and easy. Additional details: * Allows Holley RetroBright headlights to connect to any non-standard H4 sockets or those that require a pin swap * Eliminates the need to cut factory wiring * Can be used to replace old and brittle factory sockets * Includes two Holley RetroBright H4 adapters
( 1 )
$6.57
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$11.33
$3.61
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$6.23
On Sale
Getting a high-powered drag car to hook is the key to low elapsed times and win lights. Whether a small tire radial car or a full out Pro-Mod, all racecars will benefit from Holley's Time-Based Traction Management feature. Designed for Terminator X V3 Build 110 and later, the Time-Based Traction Management is intended for drag racing, standing mile events, or other racing that starts from a stop. Traction management is based on the time from launch vs. engine and driveshaft speed (one or both can be used). The tuner enters several curves that will retard ignition timing and can also enable rev limiting based on the departure of wheel or engine speed from the base curve. Each Holley EFI Terminator X Active Speed management software purchase allows activation of the traction management features for a single ECU. Once purchased, instructions will be emailed to the purchaser on how to access the feature. Please note that it may take up to an hour for the email to arrive after the order has been placed. Features: * Active Speed Management--traction control based on engine speed and/or driveshaft speed * Import Racepak driveshaft curve and rpm data directly into your ECU * Import crankshaft or driveshaft curves from previous pass, curve will automatically populate on the graph * Requires driveline speed sensor, be it wheel or driveshaft speed
Not Yet Reviewed
$574.95
$516.95
On Sale
Holley offers RetroBright headlight wiring connectors in male or female configurations. These unterminated headlight connector are designed for use on any H4 or 9003 system where an extra connector is needed for an adapter harness for RetroBright headlights.
Not Yet Reviewed
$3.05
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$3.51
$2.74
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$3.16
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