HOLLEY EFI AVENGER ECU
- This is a service replacement part for the Holley Avenger EFI system that includes the ECU & handheld tuner only.
- Please see the following Avenger systems for full feature descriptions:
- Avenger EFI 2bbl Throttle Body Fuel Injection System - 550-200
- Avenger EFI Multi-Point Fuel Injection Systems - 550-811 (early to late heads), 550-816 (Vortec heads), 550-831 (rectangular port heads), & 550-836 (oval port heads)
- Avenger EFI Stealth Ram(tm) Systems - 550-821 (early to late heads), 550-822 (early to late heads - polished), 550-826 (Vortec heads), & 550-827 (Vortec heads - polished)