MoTeC M48 “Gold Box” Motorsport Wiring Loom

Motorsport-grade ETFE (MIL-W-22759/16) wiring loom engineered specifically for the MoTeC M48 “Gold Box” Engine Control Unit.

This wiring loom is designed for builders who require a reliable, professional-grade electrical foundation for a MoTeC M48 “Gold Box”–controlled engine. Hand-built using MIL-W-22759/16 motorsport-grade ETFE wire, it is intended for high-performance and motorsport applications where heat, vibration, and electrical noise are part of the operating environment.

Whether you’re completing a ground-up race build, an engine conversion, or a high-end street car, this loom removes the compromises commonly found in universal or automotive-grade wiring.

Designed Specifically for MoTeC M48 “Gold Box”

This loom is pinned exclusively for the MoTeC M48 “Gold Box” ECU. Every circuit is allocated correctly for the ECU’s 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 readings, 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 harsh motorsport environments.

Key benefits include:

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

• Thin, lightweight insulation for compact, low-bulk 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 M48 “Gold Box” 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:

• Motorsport builds (circuit, drag, time attack)

• Engine swaps and custom conversions

• Classic and period-correct motorsport applications

• Professional workshops and 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

• MoTeC M48 “Gold Box” 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 Serious Builds

The MoTeC M48 “Gold Box” is a proven motorsport ECU. This loom is designed to support it properly — without shortcuts, compromises, or unnecessary complexity.

Select options above or contact us to discuss custom requirements.

Legal Notice

MoTeC® is a registered trademark of MoTeC Pty Ltd. This product is not affiliated with or endorsed by MoTeC.