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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.

Showing 17–32 of 174 results

  • MegaSquirt-III Daughterboard Kit

    $230.00

    Upgrading your MS1 or MS2 to the latest MS3 has never been easier with this processor replacement! We've packaged the MS3 daughter board with 2 of the 40 pin sockets, so it will match up with our cases (required for upgrade) which have cutouts for the SD ...

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  • MegaSquirt-III MS3X Expansion Card & Connector Kit

    $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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  • 24″ MegaSquirt Pigtail Harness (MS1/MS2/MS3 Ready)

    $53.00

    MegaSquirt Wiring Harness - 24 inches long Completely redesigned version adds more features to help make your installation as easy and reliable as possible. We've now brought the improvements from the long harness over to the pigtail harness. This min...

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  • MegaSquirt Relay Cable

    $89.00

    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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  • DIYBOB Breakout Adapter – Nippon Denso 76 pin

    $94.00

    The DIYBOB is an exclusive breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connector, circuit ...

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  • DIYBOB Breakout Adapter – Nippon Denso 52 pin

    $94.00

    The DIYBOB is an exclusive breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management system of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connector, c...

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  • DIYBOB Breakout Adapter – Nippon Denso 42 pin

    $94.00

    The DIYBOB is an exclusive breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management system of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connector, c...

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  • DIYBOB Breakout Adapter – Nippon Denso 122 Pin

    $94.00

    The DIYBOB is an exclusive breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management system of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connector, ...

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  • DIYBOB Breakout Adapter – JECS 93 pin

    $94.00

    The DIYBOB is an exclusive breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management system of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connector, c...

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  • DIYBOB Breakout Adapter – JAE 88 pin

    $94.00

    DIYBOB is an exclusive breakout board from DIYAutoTune.com that allows you to easily build professional looking adapter harnesses connecting your choice of engine management system to a wide variety of cars.  DIYBOB includes an OEM style connector, circu...

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  • DIYBOB Breakout Adapter – JAE 64 pin

    $94.00

    The DIYBOB is a revolutionary breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management system of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connect...

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  • DIYBOB Breakout Adapter – Delphi 56 pin

    $94.00

    The DIYBOB is a revolutionary breakout board from DIYAutoTune.com that allows you to easily build professional adapter harnesses connecting the engine management system of your choice to a wide variety of cars.  The DIYBOB includes an OEM style connecto...

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

    $72.00

    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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  • JimStimX Expansion Board – Unassembled

    $47.00

    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 Wiring Bundle – 23″ Long

    $15.99

    MegaSquirt Wiring Bundle - 23" Long Perfect for creating your harness adapter (perhaps using a DIYBOB along with this) or for tying into your stock wiring harness! 23" TXL wire, color coded with labeling printed on the wire every 3 inches -- no p...

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  • MegaSquirt 3X Wiring Bundle – 8′ long

    $51.00

    MegaSquirt MS3X Wiring Bundle - Length = 8' 8' 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 Just ...

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