Holley Ford TFI Ignition Harness For Avenger EFI/ HP EFI/ Dominator EFI
Highlights
- Designed For TFI Distributors
- Compatible With Holley Systems
- Premium Components
- Enhances Performance
Holley Ford TFI Ignition Harness for Avenger EFI, HP EFI, and Dominator EFI Systems.
If you're in need of a reliable ignition harness for your TFI distributor, look no further than the Holley Ford TFI Ignition Harness (558-305). This versatile harness is designed to work seamlessly with Holley Avenger EFI, HP EFI, and Dominator EFI systems, making it the perfect choice for anyone who wants to enhance their engine's performance. Made from premium components, this harness is built to last and can withstand the toughest conditions.
Features and Benefits:
- Designed for use with TFI distributors
- Compatible with Holley Avenger EFI, HP EFI, and Dominator EFI systems
- Versatile harness
- Made from premium components
- Enhances performance
Vehicle Fitment:
- 1965-1995 Mustangs
- 1948-1979 F-100s
- 1966-1977 Broncos
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Electrical & Wiring, Mustang EFI Engine & Injector Harnesses, Ford Bronco Parts, Ford F-100 Parts
Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:
- 1965 and older U.S. manufactured California certified vehicles
- 1967 and older U.S. manufactured federally certified vehicles
Installation Difficulty

Intermediate skill is required for this installation.
Installation Instructions
Vehicle Fitment
This product will fit the following Bronco years:
This product will fit the following F-100 years:
- 1948,
- 1949,
- 1950,
- 1951,
- 1952,
- 1953,
- 1954,
- 1955,
- 1956,
- 1957,
- 1958,
- 1959,
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
This product will fit the following Mustang years:













