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ECU - Universal Wire-In

MS3Pro is ready to support a wide variety of engines out of the box, with the ability to control anything with one to eight cylinders with sequential fuel injection and sequential ‘coil on plug’ ignition, a V12 with sequential fuel and wasted spark ignition, or a four rotor Wankel with separate leading and trailing ignition outputs. Over 50 different ignition modes are supported, from mainstream applications like the GM LS1, Bosch Motronic, and Chrysler Gen III Hemis to unusual modes like Renix Jeeps and the Suzuki Swift GTI.

MS3Pro uses a sealed high temperature nylon case for light weight and compact size, and heavy duty AMPSEAL connectors. This provides a compact and sealed enclosure protecting the sensitive internals from the elements. MS3Pro’s design keeps the heat generated to a minimum, allowing it to use a lighter plastic case instead of a metal heat sink.

Showing 1–16 of 19 results

  • MS3Pro EVO+ ECU

    $1,249.99$1,499.99

    The MS3Pro EVO+ by AMP|EFI represents the latest in next-generation engine management, delivering a powerful suite of tuning and control features for high-performance applications. Built on the proven MS3Pro platform, the EVO+ is equipped with three AMPS...

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  • MS3Pro EVO+ HC ECU

    5 out of 5
    $1,349.99$1,599.99

    The MS3Pro EVO+ HC (High Current) by AMP|EFI represents the latest in next-generation engine management, delivering a powerful suite of tuning and control features for high-performance applications. Built on the proven MS3Pro platform, the EVO+ HC is equ...

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  • MS3Pro Mini ECU

    5 out of 5
    From: $599.99

    Introducing the MS3Pro Mini by AMP EFI MS3Pro Mini by AMP EFI, the sleek and compact addition to our MS3Pro Wire-In ECU product line. This new ECU is designed to fit in the palm of your hand! Tailored for engines with up to eight cylinders, it boasts the...

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  • AMP’d MicroSquirt ECU

    5 out of 5
    From: $349.99

      This is the latest version of the MicroSquirt, only from AMP EFI and our dealers! The AMP'd MicroSquirt adds higher current capacity injector drivers, higher current capacity on its optioisolated input, and 4 user configurable option switche...

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  • ECU Power Package

    $99.99

    Powering your PNP harness doesn't have to be a headache. The  ECU Power Package includes everything you need to get up and running quickly and safely. Whether you're starting a new install or cleaning up an existing setup, this bundle is the perfect sol...

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  • 4 Position Power Distribution Block Kit

    $39.99

    Simplify your 12V power distribution with our 4-Position Power Distribution Fuse Block Kit. This compact solution makes it easy to power multiple accessories or circuits from a single power source—ideal for custom wiring jobs, standalone ECU systems, or...

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  • 50 Amp Relay Kit

    $19.99

    Need reliable control over high-current circuits? Our 50 Amp Relay Kit is designed for switching heavy loads like fuel pumps, fans, or auxiliary power systems. This high-capacity relay is built to handle demanding automotive and motorsport applications wi...

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  • MS3Pro EVO+ Wiring Harness – Universal Flying Lead

    $349.99

    This complete MS3Pro EVO+ 8′ Flying Lead Harness is specifically designed for seamless integration with the MS3Pro EVO+. Featuring white, black, and blue connectors with 8′ pigtails, this harness ensures a reliable and efficient wiring solution. Ea...

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  • MS3Pro EVO+ HC Wiring Harness – Universal Flying Lead

    $349.99

    This complete MS3Pro EVO+ HC 8′ Flying Lead Harness is specifically designed for seamless integration with the MS3Pro EVO+ HC. Featuring white, black, and blue connectors with 8′ pigtails, this harness ensures a reliable and efficient wiring solution....

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  • MS3Pro Mini Wiring Harness – Universal Flying Lead

    $74.99

    This complete MS3Pro Mini 8′ Flying Lead Harness is specifically designed to simplify your wiring and ensure seamless integration with the MS3Pro Mini ECU. Each wire is color-coded and labeled with its corresponding function, making the installation pro...

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  • MicroSquirt Wiring Harness – Universal Flying Lead

    5 out of 5
    $74.99

    MicroSquirt Wiring 8′ long harness, ideal for installation in larger vehicles or custom builds. This complete MicroSquirt 8′ Flying Lead Harness is specifically designed for seamless integration with AMP'd MicroSquirt and MicroSquirt ECUs. Featurin...

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  • MS3Pro Uncrimped AMPSEAL Connectors

    $89.99

    Planning to make your own ECU harness? This plug and pin kit includes everything you need to get started with a custom MS3Pro wiring setup. Key Features: Compatible with MS3Pro EVO+ MS3Pro EVO+ HC MS3Pro Ultimate ...

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  • MicroSquirt / MS3Pro-Mini AMPSEAL Connector

    $39.99

    Planning to make your own MS3Pro-Mini, MicroSquirt or AMP'd MicroSquirt harness? This plug and pin kit features a 35 pin MicroSquirt / MS3Pro-Mini connector and more than enough gold plated pins!

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  • MS3Pro Module

    5 out of 5
    $929.99

    The MS3Pro Module puts the MS3Pro circuitry on a board where we've replaced the AMPSEAL connectors with 0.100" pin headers.  What's it for?  The MS3Pro Module is the core for our MSPNP-Pro, but we're also making them available to the public.  MS3Pro M...

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  • MS Harness Extra Wire Kit

    $8.99

    This 8' wire with pre-crimped terminal can be poked into our MegaSquirt DB37 harness if an extra wire is needed for additional I/O (MSHarness12, available separately).  Made of the same TXL rated automotive grade wiring as the rest of our MegaSquirt wiri...

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  • MS3Pro 1st Gen Standalone ECU Only

    IMPORTANT PRODUCT UPDATE** MS3Pro-ECUPKG has been discontinued and superseded by MS3Pro EVO effective May 1, 2017.  This product page, including documentation, downloads & product FAQ tabs below, remains active for archive purposes.   Compare M...

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