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Holley Wiring Harnesses 558-457

SERVICE HARNESS, STANDALONE PRO DASH

Part Number: HLY-558-457

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Holley EFI Terminator X Active Speed Management Software 555-101

Computer Software, Holley EFI, Terminator X, Active Speed Management, Web Download, Drag Race Traction Control, for Terminator X, V3 or Later, Each

Part Number: HLY-555-101

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Call to Order

Holley Crankshaft Trigger Wheels 556-181

Crank Trigger Wheels, Holley EFI, Replacement, 12-1X LS, Hall Effect, 7.5 in. Diameter, Aluminum, Silver, Universal, Each

Part Number: HLY-556-181

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Holley HP EFI ECU and Harness Kits 550-606

Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, Four Digital Inputs, Wideband, CANBUS, Ford, Multi-Point, Kit

Part Number: HLY-550-606

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 26, 2026 if ordered today

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Estimated Ship Date: Mar 26, 2026 if ordered today

Holley Throttle Position Sensors 543-124

Throttle Position Sensors, Replacement, for Sniper Autolite 1100, Each

Part Number: HLY-543-124

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Holley Terminator X MAX Engine Management Systems 550-1312

Engine Management Systems, Terminator X MAX, Up to 8-EV1 Injectors, 8-Coil, Plug-and-Play, Drive-by-Wire, Tuner/Trans Control, 4R70W, Ford, 5.0L, Kit

Part Number: HLY-550-1312

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Holley HP EFI ECU and Harness Kits 550-607

Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, Four Digital Inputs, Wideband, GM, LS2, LS3, LS7, Bosch O2, Kit

Part Number: HLY-550-607

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today