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  • MegaSquirt-3 MS3X Expansion Card & Connector Kit

    4.8888888888889 out of 5
    $149.99

    Unlock the full capabilities of your MegaSquirt-3 ECU with the MS3X Expansion Card & Connector Kit. This plug-and-play expansion board installs directly inside your MS3 case — no soldering required — and connects via the included ribbon cables to ...

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

    $29.99

    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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  • MS3Pro Mini Wiring Harness Upgrade (Microsquirt to Mini)

    $19.99

    If you have a previously installed Microsquirt harness and want to upgrade to MS3Pro Mini, the upgrade path is simple.  However, complete functionality will require a few basic changes to your Microsquirt Harness.  Our wiring upgrade kit contains the 7 ...

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