Dominator EFI Kit - Universal

The Holley Dominator EFI Kit - Universal (SKU HLY550-652) is a complete fuel injection management system designed for engine builders and performance mechanics tackling modern V8 fuel injection conversions. This universal kit eliminates the guesswork of traditional carburetors by delivering precise, computer-controlled fuel metering across all load ranges and RPM bands. Whether you're restoring a classic muscle car, building a custom engine swap, or upgrading a high-performance street application, the Dominator EFI Kit provides the electronic control module and wiring harness foundation necessary for seamless integration.

At the core of this system is Holley's advanced Engine Control Module, which continuously monitors intake manifold pressure, throttle position, engine temperature, and oxygen sensor feedback to optimize fuel delivery in real time. The comprehensive wiring harness included in this kit simplifies installation by consolidating all sensor connections and solenoid outputs into organized, color-coded pathways—reducing installation errors and diagnostic complexity. The universal configuration allows adaptation across diverse V8 platforms without manufacturer-specific constraints, though proper tuning and calibration to your specific displacement, intake design, and intended operating parameters remain essential for peak performance and reliability.

Experienced engine builders and performance shops favor the Dominator EFI Kit for street rod builds, vintage race vehicles, and high-horsepower crate engine installations where OEM-locked ECUs are not an option. The modular approach allows tuners to adjust ignition timing, fuel enrichment curves, and idle parameters without vendor firmware restrictions. Before installation, verify compatibility with your specific intake manifold design, fuel rail configuration, and sensor placement—the universal nature of this kit requires careful planning to ensure all wiring routes and sensor locations align with your engine bay layout and performance targets.