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MS3Pro ULTIMATE Uncrimped AMPSEAL Connectors


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Our offices are closed today due to an area wide state of emergency.  We anticipate a brief shipping delay as our roads are closed due to severe ice. We appreciate your patience.  Thank you for your order!


Planning to make your own ULTIMATE harness? This plug and pin kit features the MS3Pro ULTIMATE AMPSEAL white, black & gray connectors, plus 100 pins- more than enough for making your own!

(EVO/ 1st Gen 2-connector AMPSEAL Kit sold separately)

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Are these AMP connectors compatible with other MegaSquirt products?

  • No.  Even though other MegaSquirt products also use 35-pin AMP connectors, each connector has a unique keying, and each harness has a unique pinout.  These connectors are keyed to fit MS3-Pro ECU only and will not fit other products such as Microsquirt.  This is to prevent someone from accidentally damaging an ECU by using an incorrect harness.

How do I assemble this connector?

Where can I find the MS3-Pro Wiring Schematic for making my harness?

What tool do I need to crimp these pins?

  • The manufacturer's recommended crimp tool is TE Connectivity part number 58529-1. We currently do not stock this, but you can order this from many electrical supply companies, including Digi-Key or Mouser.

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