EFI Online proudly supply the complete range of Holley EFI performance products.

The Holley EFI HP ECU & Harness | Gen IV EV6 is a high-performance electronic fuel injection system designed specifically for Plug & Play control of late 58x LS Engines. With its advanced features and easy installation, this kit provides complete tuning control over your engine, making it perfect for a wide range of applications, from small 5.3 engines to powerful 3,000+hp race engines.

One of the key benefits of the Holley EFI ECU is its plug & play control, which utilizes the OEM sensors for easy installation. All you need to do is wire in the grounds, power, and ignition to begin tuning. The added functionality of this kit allows you to control Boost, Nitrous, Water Meth Injection, Fuelling, Cooling, and Relays, giving you ultimate control over your engine's performance.

The self-learning feature of the Holley EFI ECU makes tuning a breeze. It automatically adjusts the fuel and ignition maps based on the driving conditions, ensuring optimal performance at all times.

The kit includes everything you need to get started, including the ECU, harness, communication cable, software, USCAR (EV6 Style) injector connectors, Bosch wideband O2 sensor, and sealed automotive and marine grade connectors. The ECU is fully potted and can be mounted in the engine compartment or interior, and it is certified to ISO 8846, SAE J1171, and United States Coast Guard requirements for Ignition Protection and Fire Resistance.

For even more control and vehicle monitoring, you can opt for the plug and play hand-held programmer, 5.7" touch screen, and digital gauges, which are available separately.

If you're unsure about which ECU option is best suited for your needs, our team at EFI Online is here to help. Contact us to discuss your requirements and we'll guide you towards the right choice for your vehicle.

Experience the power and precision of the Holley EFI HP ECU & Harness | Gen IV EV6 and take your engine performance to the next level.