Description
MS3Pro ULTIMATE Complete 8′ Flying Lead Harness Only (White-Black-Gray connectors with 8′ pigtails) arrives with color-coded, printed wires per the pinout below.
All applications.

Making your own harness? This plug and pin kit features the MS3-Pro AMPSEAL connectors plus 75 pins (so you'll have a couple extras) for making your own MS3-Pro EVO harness. (or Gen1 if you wish) Download AMPSEAL Assembly Instructions
Add to cartUse this module to convert the sine wave signal from a VR (variable reluctor) signal into an easy to handle square wave. The AXM-120 VR conditioner works with camshaft position, crankshaft position, vehicle speed, or similar sensors. Common uses for thi...
Add to cartThe MS3Pro ECU’s feature user-replaceable fuses that protect against voltage spikes and other abuse. To replace these fuses, use a needle nose pliers to pull the fuse out of its holder, and then push in the replacement fuse by hand. This is the 100...
Add to cartThe Quad EGT CAN Module is a high-precision, 4-channel thermocouple interface designed to give you professional-grade exhaust gas temperature data for each cylinder. Compatible with MegaSquirt ECUs and other systems via configurable CAN IDs, it’s perfec...
Select optionsIf you have a previously installed MS3Pro harness (1st Gen) and want to change to an MS3Pro ULTIMATE or EVO ECU, the upgrade path is simple. However, complete functionality will require a few basic changes to your 1st Gen harness. Our wiring upgrade ki...
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