Holley Dominator Motorsport Wiring Loom

Motorsport-grade ETFE (MIL-W-22759/16) wiring loom engineered specifically for the Holley Dominator Engine Control Unit.

This wiring loom is designed for builders who require a no-compromise, professional-grade electrical foundation for a Holley Dominator–controlled engine. Hand-built using MIL-W-22759/16 motorsport-grade ETFE wire, it is intended for advanced motorsport and high-performance applications where heat, vibration, electrical noise, and system complexity are part of the operating environment.

The Holley Dominator is the flagship ECU in the Holley EFI range, offering extensive I/O capability and advanced control functionality. This loom removes the compromises commonly found in universal or automotive-grade wiring.

Designed Specifically for Holley Dominator

This loom is pinned exclusively for the Holley Dominator ECU. Every circuit is allocated correctly for the ECU’s extensive engine management inputs, outputs, power supply, and advanced CAN communications — with no universal pinouts, repurposed circuits, or guesswork.

The result is a clean, predictable wiring system that supports accurate sensor data, stable ECU operation, and reliable integration with CAN-based systems including dashes, PDMs, and data logging devices.

Built Using Motorsport-Grade ETFE Wire (MIL-W-22759/16)

MIL-W-22759/16 ETFE wire was originally developed for aerospace and military applications and is ideally suited to high-density, high-channel-count motorsport wiring systems.

Key benefits include:

• Excellent resistance to heat, fuels, oils, and automotive chemicals

• Thin, lightweight insulation for compact, low-bulk looms with high I/O density

• High durability under vibration and continual movement

• Reduced risk of insulation degradation over time

This wire is selected for reliability — not cost.

Terminated or Unterminated Options

This Holley Dominator loom is supplied in an unterminated (flying lead) configuration as standard, allowing complete flexibility for complex engine layouts, sensor arrays, and advanced system integration.

A pin placement sheet showing wire numbers is available to download to assist with installation.

Custom terminations, wire lengths, additional I/O provisions, and CAN integration requirements can be discussed prior to ordering if required.

Suitable Applications

This loom is suitable for:

• Advanced motorsport and competition vehicles

• Circuit racing, drag racing, and endurance builds

• High-output and complex engine management systems

• Engine swaps and full custom projects

• Professional race teams and specialist performance workshops

This is not a vehicle-specific plug-and-play harness. It is intended for advanced custom installations where control, reliability, and electrical integrity are critical.

What’s Included

• Holley Dominator ECU connector(s)

• Pre-wired ETFE (MIL-W-22759/16) wiring loom

• Built to order and quality checked prior to dispatch

Sensors, actuators, PDMs, and the ECU are not included.

Built to Support Flagship Holley EFI Systems

The Holley Dominator is the most powerful ECU in the Holley EFI lineup, designed for demanding motorsport and high-performance applications. This loom is built to support it properly — without shortcuts, compromises, or unnecessary complexity — while meeting professional motorsport wiring standards.

Legal Notice

Holley® is a registered trademark of Holley Performance Products, Inc. This product is not affiliated with or endorsed by Holley.