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550-656 Dominator EFI ECU with GM LS1 Main Harness w/Transmission Control and EV1 Injector Harness
InfoVehicle Info Needed
HOLLEYPART NUMBER: 510-550-656

550-656 Dominator EFI ECU with GM LS1 Main Harness w/Transmission Control and EV1 Injector Harness

$3,59995
ShippingShips on Sep 14, 2026
Lowest PriceLowest Price Guarantee

ECU Kits
Dominator EFI Kit
  • GM LS1, LS2, LS6 Engine
  • w/4L60E, 4L80E Transmission
  • w/24X Crank Sensor and 1X Cam Sensor
  • Includes:
    • Dominator ECU
    • ECU Power Harness
    • Engine Main Harness
    • EV1 Injector Harness
    • USB Cable
    • Wideband Sensor

      This Holley 550-656 Dominator EFI Kit features Holley's Dominator EFI ECU and wiring harnesses for GM's LS1, LS2, and LS6 engines equipped with a 24X crankshaft sensor, 1X Camshaft position sensor, and using EV1 style injectors and a GM 4L60E or 4L80E transmission.

      Emissions Note:

      This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

      CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    • Part TypeEngine Control Module
    BrandHOLLEY
    Package Height9.9
    Package Width15.1
    Package Length26.8
    Weight14.3 PG
    Part CategoryPerformance Parts
    Wiring Harness IncludedYes
    QuantitySold as a Kit
    Mounting Hardware IncludedYes
    Part FitmentSemi Universal
    Mount Hole Quantity4
    Vendor Part Number550-656
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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