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Brand: Holley EFI

Holley EFI EV6 Unterminated Injector Harness Kit

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$149.95

$168.95

This harness kit comes with everything you need to build a custom cut to fit...

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Brand: Holley EFI

Holley EFI Ford GT500 and 3V Drive-by-Wire Throttle Body Harness

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$474.95

$534.95

Introducing a new Holley EFI DBW Throttle Body wiring harness for the OEM (Original Equipment...

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Brand: Holley EFI

Holley EFI GM Drive-By-Wire Harness

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$249.95

$281.95

Dominator EFI GM Drive-By-Wire Harness

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Brand: Holley EFI

Holley EFI GM Drive-By-Wire Harness - Early Truck

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$269.95

$303.95

Terminator X Max and Dominator EFI GM DBW Harness-Early Truck. Compatible with GM part number...

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Brand: Holley EFI

Holley EFI GM GEN V GDI Sub Harness

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$149.95

$168.95

GM GEN V GDI Sub harness for early LTx Engines. The fuel pressure sensor easily...

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Brand: Holley EFI

Holley EFI GM GEN V GDI Sub Harness

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$149.95

$168.95

GM GEN V GDI Sub harness for Late LTx Engines. The fuel pressure sensor easily...

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Brand: Holley EFI

Holley EFI Transmission Control Harness - GM 4L60 (Pre-2009) and 4L80

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$299.95

$337.95

Expanding our transmission control options for our EFI systems, this harness provides plug and play...

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Brand: Holley EFI

HP EFI ECU & Harness Kits

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$3,299.95

$3,712.95

Looking for a plug and play kit for your Ford Modular engine? The HP ECU...

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Brand: Holley EFI

HP EFI ECU & Harness Kits

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$3,049.95

$3,431.95

Looking for a plug and play kit for your Ford Modular engine? The HP ECU...

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Brand: Holley EFI

HP EFI ECU and Harness Kits

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$3,049.95

$3,431.95

Looking for a plug and play kit for your Ford Modular engine? The HP ECU...

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Brand: Holley EFI

HP EFI ECU and Harness Kits

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$3,299.95

$3,712.95

Looking for a plug and play kit for your Ford Modular engine? The HP ECU...

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Brand: Holley EFI

Includes VVT and Oil Pump Connectors on IGN1A Smart Coils

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$499.95

$562.95

The Terminator X offers an advanced engine management solution specifically tailored for the formidable 7.3-liter...