Availability

- In Stock Items. Ships Today. (4) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- In Stock Items, Including at a Supplier. Ships In a Few Days. (9) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (11) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Stock EFI System
- No (8) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Yes (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Metering Style
- Mass airflow (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Speed density (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Universal
- No (8) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Yes (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Model
Make/Engine
Quantity
- Sold as a kit. (6)
- Sold individually. (3)

Fuel Injection System Wiring Harnesses

Showing In Stock Items. Show All 11 Items.

Individual Parts

Part Groups

Results 1 - 9 of 9

Holley EFI Systems Wiring Harnesses 558-113

Wiring Harnesses, Holley EFI, Ford 2V/4V Modular, Main Harness, Multi-Port Fuel Injection, for Holley Smart Coils, HP EFI System, Ford, 4.6-5.4L, Each

Part Number: HLY-558-113

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 26, 2026 if ordered today

Holley EFI Systems Main Wiring Harnesses for 2011-2017 F-150, MUSTANG - 558-122

Fuel Injection System Wiring Harnesses, Holley EFI, Coyote Ti-VCT, Main Harness, Plug-and-Play, Drive-by-Wire, with Holley Smart Coils, Ford, 5.0L Kit

Part Number: HLY-558-122

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 26, 2026 if ordered today

Holley EFI Systems Wiring Harnesses 558-116

Wiring Harnesses, Holley EFI, Gen III Hemi, Throttle Position, Idle Air Controls, Factory Connectors, Chrysler, Dodge, Jeep, Hemi, Late Model, Each

Part Number: HLY-558-116

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Holley EFI Systems Main Wiring Harnesses for 2011-2017 F-150, MUSTANG - 558-110

Wiring Harnesses, Holley EFI, Coyote, with TI-VCT/Stock Coils, Main Harness, MPFI, for HP, Dominator, EFI Systems, Ford, 5.0L, Each

Part Number: HLY-558-110

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Holley EFI Systems Wiring Harnesses 558-502

Fuel Injection System Wiring Harnesses, Holley EFI, GM LS 58X Crank Sensor, Power, Bosch Injector, Main Harnesses, for HP, Dominator ECUs, Kit

Part Number: HLY-558-502

Not Yet Reviewed

Estimated Ship Date: Jan 22, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 22, 2026 if ordered today

Holley EFI Systems Wiring Harnesses 558-504

Fuel Injection System Wiring Harnesses, Holley EFI, Universal, V8 MPFI Harness, with Main, Power, Bosch Injector Harnesses, for HP, Dominator ECU, Kit

Part Number: HLY-558-504

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today