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