Dominator EFI Vehicle Management Systems are built for non-emissions street and racing engines, with transmission control, drive-by-wire, and dual wideband oxygen sensor options that give the ECU nearly unlimited capability to control any power adder, input, or output. This kit provides the main harness for GM LS2/LS3/LS7 (58x crank, 4x cam, 4.8/5.3/6.0-style) engines running EV1 injectors and a 4L60E/4L80E transmission.
Key Features:
- Integrated drive-by-wire throttle body control for two DBW throttle bodies (GM, Chrysler, Ford, and Nissan compatible)
- Two-nozzle progressive nitrous oxide control, 8 stages, by time, RPM, or boost (requires part 554-111)
- Sealed automotive and marine-grade connectors
- Progressive nitrous control, requires part 554-111
- Self-tuning fuel table strategy — the more you drive it, the more it learns
- Onboard data logger with smoothing, multiple graph views, and notes fields
- 1-7 Bar MAP sensor capability for naturally aspirated or boosted applications
- Two-channel knock control, compatible with 1- or 2-wire knock sensors
- Integrated electronic transmission control for GM 4L60E/4L80E
- Individual cylinder fuel and spark control
- ECU is fully potted and can be mounted in the engine bay or interior
- Fully featured turbocharger boost control with configurable timing retard per stage
- Optional digital displays: 7" Digital Dash (553-106) or 3.5" Touch Screen LCD (553-108)
- Racepak Integration Module available
Specifications:
- Engine Platform: GM LS2/LS3/LS7 (58x crank, 4x cam)
- Injector Connector: EV1
- Transmission Control: 4L60E, 4L80E
- Kit Includes: Dominator ECU, USB cable, ECU power harness, engine main harness, EV1 injector harness, Bosch wideband oxygen sensor, ECU mounting hardware
- MAP Sensor Range: 1-7 Bar
- ECU Dimensions: 13.14" length x 6.10" width, height variable 1.00"-1.84"
- Mounting Bolt Pattern: 12.13" x 6.10"
- Certification: ISO 8846, SAE J1171 & U.S. Coast Guard ignition protection and fire resistance requirements
- Part Number: 550-658
Dominator EFI systems are sold à la carte — a complete system requires the ECU, main power harness, wideband oxygen sensor, engine main harness, injector harness, ignition adapter harness, and accessories, each purchased separately as needed. If running a transbrake, Holley requires a relay or its Transbrake input protection device (P/N 554-128) to protect the ECU from flyback voltage when the transbrake releases.
FAQ
What engines does this harness kit fit?
GM LS2/LS3/LS7 engines (58x crank, 4x cam, 4.8/5.3/6.0-style) running EV1 injectors.
How does this differ from the DBW version (550-660)?
This kit includes transmission control for GM 4L60E/4L80E but does not include drive-by-wire throttle body control.
What's included in the kit?
The Dominator ECU, USB programming cable, ECU power harness, engine main harness, EV1 injector harness, Bosch wideband oxygen sensor, and ECU mounting hardware.
Does this system support boost or nitrous control?
Yes. It includes fully featured turbocharger boost control and 8-stage progressive nitrous oxide control (nitrous staging requires part 554-111).
Do I need anything else to run this on a transbrake car?
Yes — Holley requires a relay or its Transbrake input protection device (P/N 554-128) to protect the ECU from flyback voltage when the transbrake releases.