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558-420 Holley EFI Terminator EFI Input/Output Kit
$48.32PN 558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain. It contains Input wires for Inputs 1-4. It contains one wire for Output 2. These inputs and outputs can perform features and functions that must be... -
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558-455 Holley EFI 2009+ GM 4L60E Transmission Control Harness
$257.95Expanding on our Transmission Control options from Holley EFI. This new harness 558-455 from Holley EFI provides plug and play transmission control for the 2009+ GM 4L60 when used with a Dominator ECU. The 2009+ GM 4L60E contains an internal turbine... -
558-124 Holley EFI Holley EFI Ford Coyote Ti-VCT Sub Harness (2011-2012)
$250.95Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote junkyard engine with locked cams? Unlock the full potential... -
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550-918 Holley EFI Terminator X Max LS2/LS3 and Late 58x/4x LS Truck MPFI Kit with Transmission Control
$1,828.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley... -
550-919 Holley EFI Terminator X Max LS1 24x/1x MPFI Kit with Transmission Control
$1,828.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley... -
550-916 Holley EFI Terminator X Max LS1 24x/1x MPFI Kit with Transmission Control
$1,828.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley... -
550-920 Holley EFI Terminator X Max LS2/LS3 and Late 58x/4x LS Truck MPFI Kit with Transmission Control
$1,799.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley... -
550-928 Holley EFI Terminator X Max LS2/LS3 and Late 58X/4X LS Truck MPFI Kit with DBW Throttle Body and Transmission Control
$1,999.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley... -
550-927 Holley EFI Terminator X Max Early Truck 24X/1X LS MPFI Kit with DBW Throttle Body and Transmission Control
$1,999.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley... -
550-926 Holley EFI Terminator X Max LS1 24X/1X MPFI Kit with DBW Throttle Body and Transmission Control
$1,999.95Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...
