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Adapter Cable for Timing and RPM Controllers to GM Factory Sensors
InfoVehicle Info Needed
MSD IGNITIONPART NUMBER: 121-8886

Adapter Cable for Timing and RPM Controllers to GM Factory Sensors

$8795
ShippingShips on Sep 11, 2026
Lowest PriceLowest Price Guarantee

Harnesses
Plug-and-Play Adapter Harness for a Timing and RPM Controller
  • Fits Factory GM EFI Wiring and Crank Trigger Sensors
  • Adapts a Timing and RPM Controller to a Factory EFI System
  • No Splicing into Factory Wiring

    Adding a programmable timing controller to a factory EFI engine normally means cutting into the sensor wiring, which is both slow and easy to get wrong. This adapter cable plugs between the controller and the factory harness so the crank trigger and other sensor signals reach the controller without splices, letting you manage timing and rpm limits on a stock EFI system.

    MSD 8886 Adapter Cable Features:

    • Connects a timing and rpm controller to factory GM sensors.
    • Plug-and-play to the factory wiring, no splicing required.
    • Picks up the factory crank trigger and other sensor signals.
    • Allows timing management and programmable rpm limits on a factory EFI system.
    • 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 Height3.0
    Package Width10.2
    Package Length13.2
    Weight1.22 PG
    Part CategoryPerformance Parts
    Universal Or Specific FitSpecific
    Trigger StyleCrank trigger
    QuantitySold Individually
    Part FitmentSemi Universal
    Vendor Part Number8886
    Package Qty1
    Package TypeEA
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