Replacement Parts for HLY-550-1221

Holley Terminator X Engine Management Systems 550-1221

Holley Terminator X Engine Management Systems 550-1221

HLY-550-1221

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Part Number: HLY-550-1221

Estimated Ship Date from Texas: Today

$2,049.95

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Holley Terminator X Engine Control Modules 554-152

Holley Terminator X Engine Control Modules 554-152

Holley Terminator X Engine Control Modules 554-152

Engine Management Systems, Holley EFI, Terminator X, Controls 8-Injectors, 8-Coils, Analog Input/Outputs, Wideband, CANBUS, Chevy, Ford, Dodge, Each

Part Number: HLY-554-152

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Holley EFI Systems Wiring Harnesses 558-113

Holley EFI Systems Wiring Harnesses 558-113

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: Nov 11, 2026 if ordered today

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Estimated Ship Date: Nov 11, 2026 if ordered today

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