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Vehicle Info NeededHOLLEYPART NUMBER: 510-550-658
550-658 Dominator EFI ECU with GM LS2 Main Harness w/Transmission Control and EV1 Injector Harness
$3,59995
Ships on 09/15/2026
Lowest Price GuaranteeECU Kits
Dominator EFI KitGM LS2, LS3, LS7 (4.8L, 5.3L, 6.0L) Engines w/4L60E, 4L80 Trans w/58X Crank and 4X Cam Sensor Includes:
- Dominator ECU
- ECU Power Harness
- Engine Main Harness
- EV1 Injector Harness
- USB Cable
- Wideband O2
This Holley 550-658 Dominator EFI Kit features Holley's Dominator EFI ECU and wiring harnesses for GM LS2, LS3, LS7, 4.8L, 5.3L, 6.0L 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 Height10.0
Package Width15.0
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 Number550-658
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
