Megasquirt is a truly revolutionary performance oriented engine management system (EMS). It was designed by Al Grippo and Bruce Bowling, and is currently one of the few low cost and yet powerful aftermarket engine management units on the market.

Each SymTech Megasquirt ECU comes professionally assembled and configured for your application. No soldering, crimping or connecting is required inside the unit whatsoever! Simply plug in a SymTech Megasquirt wiring harness and you're good to go!

You can choose between either the MS-I chip or MS-II daughter card, and the v2.2 or v3.0 main boards. Then, you have hundreds of standard and MS/Extra hardware configurations to choose from to suit your needs. We even offer consultation and complete MS system design!

Please view our Megasquirt option service page for hardware options and additional circuits:

Megasquirt Option Service

Megasquirt units are custom built to order and require a two week lead time. Please contact our sales team if you need expedited service.

SymTech 420A Megasquirt Wiring Guide: GIF | PDF
SymTech 4G63 Megasquirt Wiring Guide: GIF | PDF