Availability
Holley EFI Systems Main Wiring Harnesses
Not Yet Reviewed
Fuel Injection System Components, Holley EFI, Main Harness, Plug-and-Play, Factory PWM/IAC Connectors, with OE Injectors, Ford, Mustang, 5.0L, Each
Part Number: HLY-558-128
Not Yet Reviewed
Estimated Ship Date: Monday 2/16/2026 if shipped by air
Estimated Ship Date: Monday 2/16/2026 if shipped by air
Wiring Harnesses, Holley EFI, LT4 Engine, Main Harness, for Terminator X, V3 ECU, Cadillac, Chevy, Each
Part Number: HLY-558-130
Not Yet Reviewed
Estimated Ship Date: Monday 2/16/2026 if shipped by air
Estimated Ship Date: Monday 2/16/2026 if shipped by air
Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, Main Harness, Terminator X, Terminator Max X Systems, Ford, Mustang, 5.0L, Each
Part Number: HLY-558-513
Not Yet Reviewed
Estimated Ship Date: Mar 4, 2026 if ordered today
Estimated Ship Date: Mar 4, 2026 if ordered today
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