AMP EFI

MS3Pro Ultimate Wiring Harness, 8-Foot

$349.99

SKU: MS3Pro-Ultimate-HRN-PKG

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The AMP EFI MS3Pro Ultimate Wiring Harness Package is a full-featured, 8-foot flying lead harness specifically engineered for use with the MS3Pro Ultimate ECU. This package provides a flexible and reliable wiring solution for custom or upgrade installations, featuring white, black, and gray AMPSEAL connectors along with generous pigtails. Installation is streamlined thanks to the color-coded and clearly printed wires, which eliminate guesswork, save time, and simplify diagnostics and troubleshooting. This universal harness is constructed with automotive-grade materials, ensuring durability and resistance to heat and vibration for long-term use. Ideal for custom engine swaps, standalone ECU projects, race car rewiring, and retrofit EFI conversions, this harness supports the full I/O capabilities of the MS3Pro Ultimate ECU. Its key features include an 8-foot flying lead design, AMPSEAL connectors, and high-temperature automotive-grade wire.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandAMP EFI
Part NumberMS3Pro-Ultimate-HRN-PKG
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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