Holley Fuel Injection Systems

Holley has made it easy to select just the right engine control unit for your needs. Choose from the Avenger, the HP, or the Dominator EFI ECU.

Holley Avenger: EFI Made Easy!

Don't think that just because this is the entry level ECU offered by Holley EFI that it has entry-level capabilities. It is designed for the performance enthusiast who has been happy with carburetion, but who wants the benefits of fuel injection, without the programming requirements of the more advanced systems. The Holley HP features self-tuning technology and an easy-to-use hand-held controller. No need for a laptop computer or learning new software.

Holley Avenger EFI may be right for you if any of these are true:

• You want to avoid software and laptops.
• You are replacing a 2- or 4-barrel Holley Carburetor.
• You do not expect to need advanced tuning features.

Learn more about the Holley Avenger Fuel Injection System

Holley HP: Programmable EFI, Simplified!

With the Holley HP ECU, you get the features that have only before been available from the world's most expensive programmable ECU's, but at a price you can afford. How programmable? Control fuel and spark right down to the individual cylinder, if you wish. Datalogging? Up to 2GB onboard. Built-in control for turbo boost, progressive nitrous (up to 4 stages!), and water-methanol injection. Closed-loop fuel control with a Wideband O2 sensor, and self-tuning capability. And if all of that isn't enough, you get 4 programmable inputs and 4 programmable outputs to handle those other events.

Holley HP EFI may be right for you if any of these are true:

• You are replacing a 4-barrel Holley Carburetor.
• You are controlling an engine up to 8 cylinders.
• You need programmable control of fuel and spark.
• You need control of turbo, nitrous, and/or water/methanol.
• You need up to 4 user-programmable inputs or outputs.
• You need datalogging.

Learn more about the Holley HP Fuel Injection System

Holley Dominator: The Standard for Engine Management!

Ever wonder what a programmable ECU would be like if they pulled out all of the stops? Then take a look at the Holley Dominator ECU. Did you read all of the amazing features of the HP ECU (above)? It's got all of those for starters. But it can handle up to 12 cylinders, while doing electronic transmission control. Programmable inputs and outputs? They kind of went overboard here. 47 programmable inputs (13x "multi", 30x 0-5vdc, 4x "Speed") and 36 programmable outputs. Need to be able to store multiple calibrations for different tracks or conditions? Go for it--you can store up to four.

Holley Dominator EFI may be right for you if any of these are true:

• You are controlling an engine up to 12 cylinders.
• You need electronic transmission control.
• You need more than four programmable inputs and outputs.
• You need to be able to store setups for up to four different tracks/conditions/etc.

Learn more about the Holley Dominator Fuel Injection System