EMS 4860 Motorsport Wiring Loom

EMS 4860 Motorsport Wiring Loom

Motorsport-grade ETFE (MIL-W-22759/16) wiring loom engineered specifically for the EMS 4860 Engine Control Unit.

This wiring loom is designed for builders who require a reliable, professional-grade electrical foundation for an EMS 4860–controlled engine. Hand-built using MIL-W-22759/16 motorsport-grade ETFE wire, it is intended for performance street and motorsport applications where heat, vibration, and electrical noise are part of the operating environment.

The EMS 4860 is a proven standalone ECU used in high-performance and competition builds, and this loom removes the compromises commonly found in universal or automotive-grade wiring.

Designed Specifically for EMS 4860

This loom is pinned exclusively for the EMS 4860 ECU. Every circuit is allocated correctly for the ECU’s engine management inputs, outputs, power supply, and 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 long-term reliability.

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 performance street and motorsport environments.

Key benefits include:

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

• Thin, lightweight insulation for compact, tidy looms

• 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 EMS 4860 loom is supplied in an unterminated (flying lead) configuration as standard, allowing complete flexibility for engine layout, sensor selection, and routing.

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

Custom terminations, wire lengths, and additional provisions can be discussed prior to ordering if required.

Suitable Applications

This loom is suitable for:

• Performance street vehicles

• Motorsport and competition builds

• Engine swaps and custom conversions

• Turbocharged and naturally aspirated engines

• Professional workshops and performance fabricators

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

What’s Included

• EMS 4860 ECU connector(s)

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

• Built to order and quality checked prior to dispatch

Sensors, actuators, and the ECU are not included.

Lead Time

Each loom is hand-built to order. Typical lead time is displayed at checkout and may vary during busy periods.

If your build has a deadline, please contact us prior to ordering.

Built to Support Proven EMS Systems

The EMS 4860 is a well-established standalone ECU used in performance and motorsport applications. This loom is designed to support it properly — without shortcuts, compromises, or unnecessary complexity — while maintaining modern motorsport wiring standards.

Select options above or contact us to discuss custom requirements.

Legal Notice

EMS® is a registered trademark of Engine Management Systems Pty Ltd. This product is not affiliated with or endorsed by EMS.