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LS2 EFI to Ignition Controller Adapter Harness, 58 Tooth
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MSD IGNITIONPART NUMBER: 121-88862

LS2 EFI to Ignition Controller Adapter Harness, 58 Tooth

$3973
ShippingShips on 09/04/2026
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Harnesses
Adapter Harness for Connecting an Ignition Controller to Factory LS2 EFI
  • Fits 2005-2008 GM LS2 Applications with a 58 Tooth Reluctor
  • Plug-In Installation
  • Allows Timing Adjustment through the Controller

    Adding a programmable ignition controller to a factory LS2 normally means identifying and splicing into the crank and cam sensor circuits. This adapter harness does that work for you on 58 tooth reluctor applications, so the controller plugs in and you can adjust timing and set rpm limits without cutting factory wiring.

    MSD 88862 LS2 EFI to Ignition Controller Adapter Harness Features:

    • Connects an ignition controller to a factory LS2 EFI system.
    • For 2005-2008 GM LS2 applications with a 58 tooth reluctor wheel.
    • Plug-in installation with no splicing required.
    • Allows timing adjustments and rpm limit settings through the controller.
    • Give Your GM LS Engine the Spark it Deserves

      MSD Ignition Controllers for EFI or carburetor-equipped engines are compact ignition controllers that simplify installation by using matching factory-type connectors for direct plug-in for the coils, crank sensor, MAP sensor, and cam sensor. The controllers allow you to map a timing advance curve using Pro-Data+ software and also feature a programmable 2-step rev limiter, a vacuum advance curve, and a step retard

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      Unlock the full performance potential of your LS-powered build with MSD Ignition Controllers for GM Gen III/IV LS Engines. Designed specifically for LS1, LS2, LS3, LS6, and other Gen III/IV engines, these ignition controllers give you the advanced tuning capabilities needed for high-performance applications—without relying on the factory ECU.

      Whether you're running a carbureted or EFI setup, MSD ignition controllers simplify engine swaps and custom builds by offering precise control over ignition timing, rev limits, and more. With integrated MAP sensor compatibility and customizable timing maps, these units allow fine-tuned adjustments that help you dial in power exactly where you need it.

      Built with racers and hot rodders in mind, the system provides seamless integration with your MAS ignition components and aftermarket sensors. You’ll also benefit from the proven reliability and power delivery of the MSD ignition system, engineered to withstand high-RPM and high-heat conditions under the hood.

      Pair it with a high-performance MSD ignition coil for even stronger spark energy, improved combustion efficiency, and increased throttle response. Whether you're building a street machine or track-ready beast, these controllers offer unmatched flexibility and performance.

      If you're ready to take your LS build to the next level, trust MSD to deliver the tools and tech to make it happen. Precision, performance, and ease of installation—all in one controller.

    Part TypeIgnition Wire Harness
    Product LineMSD Ignition Controllers for GM Gen III/IV LS Engines
    BrandMSD IGNITION
    Package Height2.4
    Package Width9.7
    Package Length13.1
    Weight0.9 PG
    Part CategoryPerformance Parts
    Universal Or Specific FitSpecific
    Trigger StyleCrank trigger
    QuantitySold Individually
    Part FitmentSemi Universal
    Vendor Part Number88862
    Package Qty1
    Package TypeEA
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