MS3Pro Ultimate Wiring Harness Package – Universal Flying Lead

The MS3Pro Ultimate Wiring Harness Package is a full-featured, 8-foot flying lead harness built specifically for use with the MS3Pro Ultimate ECU. With white, black, and gray AMPSEAL connectors and long pigtails, this harness delivers a flexible and reliable wiring solution for custom or upgrade installations.

Each wire is color-coded and clearly printed with its function. This saves time, eliminates guesswork, and simplifies diagnostics and troubleshooting during your build.

Whether you’re wiring a fresh project from scratch or upgrading an existing setup, this universal harness is built with automotive-grade materials to withstand heat, vibration, and long-term use.

Perfect for:

• Custom engine swaps

• Standalone ECU projects

• Race car rewiring

• Retrofit EFI conversions

Key Features:

• 8′ flying lead harness tailored for the MS3Pro Ultimate

• Includes white, black, and gray AMPSEAL connectors

• Color-coded, printed wire labels for fast, accurate installation

• High-temp automotive-grade wire for long-term durability

• Supports full MS3Pro Ultimate I/O capabilities

• Ideal for custom engine builds, conversions, and motorsport wiring