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MegaSquirt Kits & Components

If you are looking for the lowest cost, rock-solid, fully tunable EFI and Ignition control solutions available, you’ve found it! MegaSquirt DIY EFI Un-Assembled Kits are incredibly well documented, clearly labeled kits where every component is labeled with it’s component number (to let you know where to install it on the PCB), as well as meticulous orientation and installation instructions. Additionally the documentation is very thorough, and walks you step-by-step through assembling your ECU, and stops along the way after major sections of the build to allow you to test the circuits you’ve built individually.

Tens of thousands of people around the world have successfully built their own MegaSquirt ECU and many of them successfully compete in a huge variety of motorsports. It’s not too hard for you to build your own ECU if you’ve got a bit of patience and are excited about the project and what you’ll learn along the way. Ever ‘painted by numbers’ before? It’s truly that simple to follow the directions and build your own ECU, by numbers.

EPA, CARB & Emissions Disclaimer- All ECU's are for race purposes only. It's your responsibility to remain in compliance with all federal, state, provincial, or other laws that apply to you.

Showing 17–32 of 144 results

  • MegaSquirt-III MS3X Expansion Card & Connector Kit

    4.8888888888889 out of 5
    $110.49

    Put this small circuit board in your MegaSquirt-III to unlock its full potential! This board installs in the MS3 case with no soldering; just connect it with the included ribbon cables. Install the MS3X board to add this whole list of inputs and outputs t...

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  • MegaSquirt Relay Cable

    5 out of 5
    $109.99

    High Quality 4' Relay Board cable for connecting your MegaSquirt ECU to your Relay Board. Works with MS1, MS2, or MS3, all standard main boards (includes not just the IAC and ignition pins - it also has the spare pins on 3 through 6). It has a shielded...

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  • MegaSquirt Wiring Bundle – 8′ Long

    4.2727272727273 out of 5
    $62.99

    MegaSquirt Wiring Bundle 8' TXL wire, color coded with labeling printed on the wire every 3 inches -- no paper tags here! IAC and Ignition wires are included for MS-I / MS-2 use (or MS-3 Primary Harness use) Shielded Ignition input wire Grea...

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  • JimStim v1.5 MegaSquirt Stimulator with Wheel Simulator – Unassembled

    4.8 out of 5
    $80.99

    Use this board to test the MegaSquirt's inputs and outputs on the bench, before you install it on a car! The JimStim features a microcontroller which allows the simulation of up to 30 different toothed wheels, in addition to the standard distributor s...

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  • JimStim 1.5 MegaSquirt Stimulator with Wheel Simulator – Assembled

    5 out of 5
    $119.99

    DIYAutoTune Part# JimStim-C JimStim is essentially an engine simulator, a microcontroller which allows the generates up to 30 different toothed wheel signals, in addition to the standard distributor signal. Test your RPM input on the Stim, or tell the ...

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  • JimStimX Kit – MS3X Stimulator Expansion Board – Unassembled

    $51.99

    The regular JimStim can test the main board on your MS3. But what if you'd like to see the inputs and outputs on the MS3X expansion card in action, too? Now it's easy - just add a JimStimX! Use the three pull-off jumpers on the JimStim to connect the 5 vo...

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  • MegaSquirt MS3X Wiring Bundle – 23″

    5 out of 5
    $29.99

    MegaSquirt MS3X Wiring Bundle - Length = 23" ~23" of TXL High temp automotive grade wire. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! Use with MS3X Expansion board or other sequential device J...

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  • MPX4250 2.5 Bar MAP Sensor

    5 out of 5
    $33.00

    MPX4250AP MAP Sensor Standard 2.5 bar Map Sensor used in MegaSquirt PCB 2.2/3.0/3.57 ECUs. Good for 21-22psi of boost, or for NA usage in non-boosted applications.

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  • MapDaddy 4 Bar MAP Sensor with Barometric Correction

    5 out of 5
    $99.99

    Who's Your MapDaddy? - MapDaddy 4 Bar MAP Sensor with Barometric Correction   Ready to rock your ride handling up to 44psi of BOOST! New version has a 4 bar MAP sensor combined with a 1 bar barometric pressure sensor to improve barometric pressure re...

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  • MegaSquirt V3.0 Case

    5 out of 5
    $46.00

    This is the enclosure as used with the MegaSquirt-III V3.0 ECU. It includes cutouts for the SD card, USB port, and MS3X expansion card. This is the case included with all of our current MS1, MS2, and MS3 V3.0 ECU kits.  It is required if you are upgradin...

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  • MegaSquirt V3.57 Case

    5 out of 5
    $46.00

    This is the enclosure as used with the MegaSquirt-III V3.57 ECU.   It includes cutouts for the SD card, USB port, and MS3X expansion card. This is the case included with all of our current MS1, MS2, and MS3 V3.57 assembled ECUs.  It is required if you ...

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  • MS3 Realtime Clock Module

    $86.99

    Add a real time clock to give your MS3's SD card logs a time/date stamp. This module solders to the MS3X board on the included pin headers. Requires a lithium battery, not included due to shipping restrictions. It's compatible with the following batteries...

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  • DB15 Pigtail Harness

    5 out of 5
    $23.99

    DB15 pigtail harness. Used for optional outputs on the expansion connector on V3.57 boards and for the V1.2 version of the MSPNP Gen 2 (the version with the red main board).

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  • DIYPNP Upgrade: Sequential Injection Kit

    5 out of 5
    $43.99

    Add two extra injector drivers to your DIYPNP with this new module and the latest MS2/Extra code! We've partnered with JBPerf to develop this tiny module with two extra injector drivers. Allows for fully sequential injection on a 4 cylinder engine, semi-s...

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  • Replacement 277-1255-ND 10 Position Screw Terminal

    $6.50

    Replacement 10 position block for relay board.

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  • Replacement 277-1249-ND 4 Position Screw Terminal

    $4.99

    Replacement 4 position block for relay board injector power terminals.

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