New MS3-Pro

The MS3-Pro can run a V8 with full sequential fuel and ignition, a V12 with sequential fuel and wasted spark ignition, or a 4 rotor Wankel with separate leading / trailing ignition. It’s also got a weatherproof case, heavy duty connectors, and more!

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217.3913mph record powered by MS3-Pro!

Jerry Hoffmann achieves a new personal best and sets multiple new records at Ohio Mile with his / MS3-Pro EMS powered Nissan 240sx.

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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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