Introducing the new MS3Pro Ultimate Engine Management System

Everything you know and love about the MS3Pro Engine Management System… plus so much more!

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Get your MS3Pro Apparel Here

Flex your MS3Pro colors!  Cotton T’s, curved or flat brim FlexFit hats!

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4L60E & 4L80E Plug & Play Transmission Control

The versatile MicroSquirt can control 4L60E & 4L80E transmissions with just a few clicks!  No wiring necessary.

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MS3-Pro is redefining state of the art in engine & powertrain control!

Experience for yourself why more and more competitors are recognizing and choosing MS3-Pro over the competition.

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MS3Pro LS 24x & 58x Plug and Play

Available NOW! Choose your injector connectors!

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Who is DIYAutoTune?

We are Your One-Stop DIY EFI Shop!

MegaSquirt Electronic Fuel Injection Systems, Wideband O2 Sensor Systems, Wiring Harnesses and more...

Based in Suwanee, GA (near Atlanta) we are the primary manufacturer and distributor of the MegaSquirt line of EMS/EFI Systems. Made right here at our facility in the USA. In short, we offer you an affordable way to run your race car on a fully programmable fuel injection and ignition controller, with plenty of high end features such as progressive nitrous control, boost control, 3 step rev limiters, electronic fan control, and spare outputs to control just about anything!
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