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  • MS3Pro 1st Gen Wiring Harness Upgrade (for ULTIMATE and EVO)


    If you have a previously installed MS3Pro harness (1st Gen flying lead or LS Drop On Harness) and want to upgrade to MS3Pro EVO or ULTIMATE ECU, the upgrade path is simple.  However, complete functionality will require a few basic changes to your 1st Ge...

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  • MegaSquirt-III MS3X Expansion Card & Connector Kit

    4.8888888888889 out of 5

    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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