Availability
Transmission Harness, Holley EFI, Transmission Control Harness, GM 4L60E, Plug-and-Play, Build in relay, for Dominator EFI ECU, Each
Part Number: HLY-558-455
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, GM LSx Engine, Main Harness Connectors, Connectors, Pins, Seals, Cavity Plugs included, Kit
Part Number: HLY-570-103
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, GM Manifold Air-temp Connector, Main Harness, GT150, 2-pin Female, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-216
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, GM, MPFI/TPI, Main Harness Connectors, J1A/J1B Connectors, Pins, Seals, Cavity Plugs included, Kit
Part Number: HLY-570-102
Not Yet Reviewed
Estimated Ship Date: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered today
Fuel Injection Systems, Terminator X Max, LT4, Direct Injection, ECM, Self Tuning, Power Adder Compatible, Wiring Harness, Oxygen Sensor. GM Late, Kit
Part Number: HLY-550-1624
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Fuel Injection Systems, Terminator X Max, LT4, Direct Injection, ECM, Transmission Controller, 6L80E Power Adder Compatible, GM Late ,Kit
Part Number: HLY-550-1634-6
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Fuel Injection Systems, Terminator X Max, LT4, Direct Injection, ECM, Transmission Controller, 6L80E Power Adder Compatible, GM Early ,Kit
Part Number: HLY-550-1633-6
Not Yet Reviewed
Estimated Ship Date: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered today
Transmission Harness, Holley EFI, Pre-terminated, GM, 1996-2008, 4L60E, 4L80E Transmissions, Each
Part Number: SNE-558-405
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Wideband Connector, Main Harness Side, Metripack, 8-pin Male, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-200
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Universal Ignition Connector, Main Harness, Metripack, 10-pin Female, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-203
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Injector Connector, Main Harness Side, Metripack, 10-pin Male, Gray Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-201
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Ignition, Sub-harness Connector, Metripack, 10-pin Male, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-204
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Replacement, Hall Effect Sensor Connector, Metripack, 3-pin Female, Black, Pins, Seals, TPA, for 554-118, Each
Part Number: HLY-570-223
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Connector Replacement Parts, Holley EFI, Replacement, Terminal Pins, Female, Metri-Pack, 20-22 gauge wire, 100-piece, Set
Part Number: HLY-571-104
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Hemi Cam/Crank Connector, Main Harness, APEX 1.2, 3-pin, Female, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-234
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Input/Output Connector, Main Harness Side, Metripack, 8-pin Female, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-209
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Connector Replacement Parts, Holley EFI, Replacement, Terminal Pins, Female, GT150, 16-18 gauge wire, 100-piece, Set
Part Number: HLY-571-107
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Connector Replacement Parts, Holley EFI, Replacement, Terminal Pins, Male, GT150, 20-22 gauge wire, 100-piece, Set
Part Number: HLY-571-103
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Knock Sensor Connector, MPFI Universal Harness, Metripack, 3-pin Male, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-205
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Power Tap Connector, Main Harness Side, Metripack, 4-pin Female, Black Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-210
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, LS MAP/CPS Connector, Main Harness, Metripack, 3-pin Female, Gray Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-217
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Weatherproof Connectors, Holley EFI, Odd/Even Coil Connector, Sub-Harness Side, Metripack, 8-pin Male, Gray Plastic, with Pins, Seals, TPA, Each
Part Number: HLY-570-208
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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
Not Yet Reviewed
Estimated Ship Date: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered today
Wiring Connector Replacement Parts, Holley EFI, Replacement, Terminal Pins, Male, Metri-Pack, 20-22 gauge wire, 100-piece, Set
Part Number: HLY-571-102
Not Yet Reviewed
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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