Holley Ignitions & Electrical

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: Dec 3, 2025 if ordered today

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Data Acquisition Components, EGT Cap, Stainless Steel, 1/4 in., Each

Part Number: HLY-543-162

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Estimated Ship Date: Tomorrow

Ignition Coil Wiring Harnesses, Holley EFI, Coil Harness, Ford 4V Modular, Plug-and-Play, for HP, Dominator EFI Systems, Ford, Mustang, 4.6L, Each

Part Number: HLY-558-315

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Estimated Ship Date: Tomorrow

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Throttle Position Sensors, Replacement, Pro-Jection, Multi-Port, 1-barrel, 2-barrel, Each

Part Number: HLY-543-3

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Dec 3, 2025 if ordered today

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Distributors, Holley EFI, Dual-Sync, Hall Effect, Computer-controlled Advance, Male/HEI, Black Cap, Steel Gear, Black Housing, Chevy, 6.0L, 7.0L, Each

Part Number: HLY-565-204BK

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Weatherproof Connectors, Holley EFI, LS1 Knock Sensor Connector, Main Harness, Metripack, 2-pin Female, Black Plastic, with Pins, Seals, TPA, Each

Part Number: HLY-570-219

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Estimated Ship Date: Tomorrow

Weatherproof Connectors, Holley EFI, GM, MPFI/TPI, Main Harness Connectors, J1A/J1B Connectors, Pins, Seals, Cavity Plugs included, Kit

Part Number: HLY-570-102

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Wiring Harnesses, Holley EFI, GM Gen V, GDI Early, Sub-Harness, Direct Injection, Pre-Terminated, 4-pin Fuel Sensor, GM, Early LT Based, Engines, Each

Part Number: HLY-558-220

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Distributors, Sniper EFI, HyperSpark, HEI Cap, Hall Effect, Billet Housing, Black, Ignition Module, Chrysler, Dodge, Plymouth, Big Block, B, Each

Part Number: SNE-565-305BK

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Estimated Ship Date: Tomorrow if ordered today

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Wiring Connector Replacement Parts, Holley EFI, Replacement, Weather Seal, Green, GT150, 20-22 gauge wire, 100-piece, Set

Part Number: HLY-571-109

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Estimated Ship Date: Tomorrow

Weatherproof Connectors, Holley EFI, Ford Modular, CTS Connector, Main Harness, SSC, 2-pin, Female, Black Plastic, with Pins, Seals, TPA, Each

Part Number: HLY-570-236

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Estimated Ship Date: Tomorrow

Distributors, Sniper EFI, HyperSpark, HEI Cap, Hall Effect, Aluminum Housing, Cast Gear, Ignition Module, Ford, Mercury, Windsor, 260-302ci, Each

Part Number: SNE-565-341

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Estimated Ship Date: Tomorrow

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Throttle Position Sensors, Replacement, Pro-Jection, Multi-Port, 2-barrel, 4-barrel, Each

Part Number: HLY-543-29

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Dec 3, 2025 if ordered today

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Weatherproof Connectors, Holley EFI, Hemi, MAP Sensor Connector, Sealed, 3-pin, Female, Black Plastic, with Pins, Seals, TPA, Each

Part Number: HLY-570-240

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Distributor Caps, Holley EFI, Coil-on-Plug, Black Cap, Screw Down Style, Black, compatible with Dual-Sync Distributors, 100 Series, Each

Part Number: HLY-566-101

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 3, 2025 if ordered today

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Wiring Connector Replacement Parts, Holley EFI, Replacement, Terminal Pins, Male, Metri-Pack, 20-22 gauge wire, 100-piece, Set

Part Number: HLY-571-102

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Estimated Ship Date: Tomorrow if ordered today

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Weatherproof Connectors, Holley EFI, LS 58X Crank/CPS Sensor Connectors, Metripack, 3-pin, Female, Black, with Pins, Seals, TPA, 10-piece, Chevy, Set

Part Number: HLY-570-318

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Wiring Harnesses, RetroBright, Adapter, H4, Non-Standard Plug, Pin-Out Swap, Plastic Version, Entry Level, Pair

Part Number: HLY-H821

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Estimated Ship Date: Tomorrow

Data Acquisition, Holley EFI, Single-channel, CAN EGT, 1/4 in. Stainless Bung, 1/4 in. Probe, Unterminated Output, Non-Holley Installations, Kit

Part Number: HLY-554-184A

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Wiring Connector Replacement Parts, Holley EFI, Replacement, Female Terminal Pins, Male, Mizu-P25, 100-piece, Set

Part Number: HLY-571-115

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Estimated Ship Date: Tomorrow if ordered today

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Spark Plug Wire Sets, Holley EFI, Cut-to-Fit, OE Coil Packs, Red Wire, 8.00mm Core, Gray Silicone, Plug Boot, Straight, Chevy, LS Engine, Set

Part Number: HLY-561-112

2.8 out of 5 stars ( 5 )

Estimated Ship Date: Dec 4, 2025 if ordered today

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Distributors, Holley EFI, Dual-Sync, Hall Effect, Computer-controlled, Male/HEI, Black Cap, Steel Gear, Polished Housing, Oldsmobile, 4.3-7.5L, Each

Part Number: HLY-565-206

3.2 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Distributors, Holley EFI, Dual-Sync, Hall Effect, Computer-controlled, Male/HEI, Black Cap, Shiny Housing, Chrysler, Dodge, Plymouth, 6.3L, 6.6L, Each

Part Number: HLY-565-209

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Estimated Ship Date: Dec 3, 2025 if ordered today

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Weatherproof Connectors, Holley EFI, Coyote, CTS Sensor Connector, Main Harness, MX 150, 2-pin Female, Black Plastic, Pins, Seals, TPA, Each

Part Number: HLY-570-226

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Estimated Ship Date: Tomorrow

Gauge Wiring Harnesses, Holley EFI, Replacement, Service Harness, CANBus/USB Connectors, for Digital Dash, Each

Part Number: HLY-558-444

Not Yet Reviewed

Estimated Ship Date: Dec 2, 2025 if ordered today

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