Out of stock
SKU: HLY550-655
UPC: 090127137154
MPN: 550-655
The Holley Dominator EFI Kit for Ford with Coil-On-Plug (COP) harness is a complete engine control module solution designed for street and performance applications requiring modern fuel injection management on Ford platforms. This comprehensive kit includes the Dominator ECU, complete wiring harness, and dedicated COP ignition harness—delivering plug-and-play integration for builders transitioning from carbureted or aging fuel systems to modern sequential fuel injection and ignition control.
The integrated approach of including both fuel injection and ignition harnesses eliminates the guesswork and custom fabrication often required when sourcing components separately. The coil-on-plug configuration allows individual ignition coil control per cylinder, enabling precise spark timing across the RPM range and supporting aggressive cam profiles or boost applications. Holley's Dominator platform is tunable via laptop, providing real-time datalogging and adjustment capabilities essential for dialing in air-fuel ratios, idle quality, cold-start enrichment, and load-dependent timing curves. The ECU accepts input from oxygen sensors, coolant temperature, intake air temperature, and throttle position sensors, creating a closed-loop system that maintains drivability across varying conditions.
This kit is suited for Ford engine swaps, restorations moving away from carburetion, and performance builds requiring adaptable engine management. Whether your project is a street-driven classic, a weekend cruiser, or a track-focused build, the Dominator EFI system provides the control architecture and harness infrastructure to support both mild and heavily modified powerplants. The included harness (SKU HLY550-655, MPN 550-655) is engineered specifically for Ford engine bay layouts, reducing fitment complications and installation time compared to generic or universal solutions.
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