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  • GM LS 58x PNP Harness and MS3Pro EVO+ Package

    From: $1,899.99

    Unleash the full potential of your engine with the MS3Pro EVO+—a cutting-edge, high-performance engine management system designed for serious racers and enthusiasts. Featuring advanced tuning capabilities, broad ignition compatibility, and seamless inte...

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  • GM LS 24x PNP Harness and MS3Pro EVO+ Package

    5 out of 5
    From: $1,899.99

    Note: This product has been expertly modified from our original 58X harness with only slight adjustments to meet 24X specifications   Unleash the full potential of your engine with the MS3Pro EVO+—a cutting-edge, high-performance engine managem...

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  • ECU Power Package

    $99.99

    Powering your PNP harness doesn't have to be a headache. The  ECU Power Package includes everything you need to get up and running quickly and safely. Whether you're starting a new install or cleaning up an existing setup, this bundle is the perfect sol...

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  • 4 Position Power Distribution Block Kit

    $39.99

    Simplify your 12V power distribution with our 4-Position Power Distribution Fuse Block Kit. This compact solution makes it easy to power multiple accessories or circuits from a single power source—ideal for custom wiring jobs, standalone ECU systems, or...

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  • 50 Amp Relay Kit

    $19.99

    Need reliable control over high-current circuits? Our 50 Amp Relay Kit is designed for switching heavy loads like fuel pumps, fans, or auxiliary power systems. This high-capacity relay is built to handle demanding automotive and motorsport applications wi...

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  • MicroSquirt CAN Transmission Controller with 4L80E Subharness

    5 out of 5
    $499.99

    4L80E Plug and Play Transmission Control via MicroSquirt Seamlessly control your 4L80E transmission with MicroSquirt Transmission Control! The supplied 4L80E subharness provides a simple, plug and play integration with MS3Pro and directly mates with ...

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  • MicroSquirt CAN Transmission Controller with 4L60E Subharness

    $499.99

    4L60E Plug and Play Transmission Control via MicroSquirt Seamlessly control your 4L60E transmission with MicroSquirt Transmission Control! The supplied 4L60E subharness provides a simple, plug and play integration with MS3-Pro and directly mates with...

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  • MS3Pro LS Plug and Play Harness Alternator Lead Extension

    $26.99

    30" extension for GM LSx alternator subharness.  Our harness will require this if used with Camaro, Firebird, GTO, or CTS-V accessory drives. You can also use this with aftermarket brackets that move the alternator to a low mount position or relocate it ...

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  • GM LS 24x PNP Harness – for MS3Pro Ultimate/Evo

    4.5 out of 5
    From: $899.00

    Note: This product has been expertly modified from our original 58X harness with only slight adjustments to meet 24X specifications   For MS3Pro ULTIMATE/ EVO plug and play installation on GM LS engines with a 24x crank trigger. The MS3-Pro 24...

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  • GM LS 58x PNP Harness

    From: $899.00

    For MS3Pro ULTIMATE/ EVO plug and play installation on GM LS engines with a 58x crank trigger. The MS3Pro 58x LSX Series Plug and Play Harness is the highest quality, best value option for LS Motors in the industry today.  Save your hard earned time a...

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  • MS3Pro LS 4L80E Trans Control Subharness

    $279.99

    Harness Only.  Optional automatic transmission control using our MicroSquirt transmission controller (sold separately).  Literally, just plug in our transmission controller with the 4L80E subharness and  you’re ready to control your trans via CAN wi...

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  • MS3Pro LS 4L60E Trans Control Subharness

    $279.99

    Optional automatic transmission control using our MicroSquirt transmission controller (sold separately).  Literally, just plug in our transmission controller with the 4L60E subharness and  you’re ready to control your trans via CAN with MS3Pro!

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