Holley Fuel Injection System Wiring Harnesses

Fuel Injection System Wiring Harnesses, Holley EFI, CAN Splitter Assembly, Pre-Terminated, Plug-and-Play, for Terminator X, Sniper EFI Systems, Each

Part Number: HLY-558-465

4.5 out of 5 stars ( 8 )

Estimated Ship Date: Today

Wiring Harnesses, Holley EFI, Replacement, LS1/6, 24X/1X Main Harness, Mass Airflow Metered, for HP, Dominator, EFI Systems Only, Chevy, 5.7L, Each

Part Number: HLY-558-102

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

• Free Shipping

Wiring Harnesses, Holley EFI, Replacement, LS Style, 58X/4X Main Harness, Speed Density, for HP, Dominator, EFI Systems Only, Chevy, 6.0-7.0L, Each

Part Number: HLY-558-103

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

Fuel Injection System Wiring Harnesses, Holley EFI, Drive-by-wire Harness, GM LSx Early Truck, MPFI, SFI, TBI, for Dominator EFI Systems, Each

Part Number: HLY-558-429

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

• Free Shipping

Fuel Injection System Wiring Harnesses, Holley EFI, CAN Adapter Harness, Male to Female Adapter, 48 in. Long, for Racepak or CAN Device, Each

Part Number: HLY-558-452

Not Yet Reviewed

Estimated Ship Date: Today

Wiring Harnesses, Holley EFI, HEI Distributor, Adapter Harness, Small Cap, Computer Controlled, for Avenger, HP, Dominator EFI Systems, Each

Part Number: HLY-558-304

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, Gen III Hemi, Injector Harness, Stock/USCAR Injectors, for HP, Dominator EFI, Each

Part Number: HLY-558-210

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Fuel Injection Systems Wiring Harnesses, Dominator EFI, J3 Auxiliary Harness, MPFI, Speed Density/Throttle, 17 Input/Outputs, Connector Included, Kit

Part Number: HLY-558-403

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Fuel Injection Wiring Harnesses, Holley EFI, CAN Adapter/Power Harness, Pre-Terminated, Plug-and-Play, 2-Pin Holley to 4-Pin CAN Device, Each

Part Number: HLY-558-430

Not Yet Reviewed

Estimated Ship Date: Today

Fuel Injection System Wiring Harnesses, Dominator EFI, GM LSx, Dual Drive-by-Wire Harness, for Throttle Bodies to Dominator EFI Systems, Each

Part Number: HLY-558-411

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Fuel Injection System Wiring Harnesses, Holley EFI, GM LS 58X Crank Sensor, Power, Bosch Injector, Main Harnesses, for HP, Dominator ECUs, Kit

Part Number: HLY-558-502

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, Ford V8, Injector Harness, Multi-Port, for HP, Dominator EFI Systems, Each

Part Number: HLY-558-209

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Wiring Harnesses, Holley EFI, Main Harness, 24X LS TBI, for Terminator, Terminator Stealth, Throttle Body Systems, Chevy, Each

Part Number: HLY-558-111

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Fuel Injection System Wiring Harnesses, Holley EFI, Includes Stealth Ram/TPI Main, Power, Injector Harnesses, for HP, Dominator ECU, Chevrolet, Kit

Part Number: HLY-558-503

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Fuel Injection Systems Wiring Harnesses, Dominator EFI, J4 Auxiliary Harness, MPFI, Speed Density/Throttle, 26 Input/Outputs, Connector Included, Kit

Part Number: HLY-558-404

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, MPFI, Mass Airflow, Injector Harness, LS Multec 2, Chevy, Truck, 4.8-6.0L, Each

Part Number: HLY-558-214

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

• Free Shipping

Fuel Injection System Wiring Harnesses, Holley EFI, Ford GT500, 3V Drive-by-Wire, Throttle Body Harness, Plug-and-Play, Ford, Mustang, 4.6L, 5.4L, Kit

Part Number: HLY-558-461

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Fuel Injection System Wiring Harnesses, Holley EFI, GM LS 58X Crank Sensor, Includes Power, EV6 Injector, Main Harnesses, for HP, Dominator ECUs, Kit

Part Number: HLY-558-501

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Wiring Harnesses, Holley EFI, Main Harness with Smart Coils, 7.3L Godzilla, Ford Each

Part Number: HLY-558-141

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Wiring Harnesses, Holley EFI, Main Harness with Stock Coils, 7.3L Godzilla, Ford Each

Part Number: HLY-558-140

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Fuel Injection System Wiring Harnesses, Holley EFI, 7.3 L Godzilla, Drive-by-Wire, Throttle Body Harness, for Terminator X, Ford, Each

Part Number: HLY-558-469

Not Yet Reviewed

Estimated Ship Date: Aug 20, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, Injector Driver harness, Plug-and-Play, MPFI, JB2 Connector, for Dominator ECU, Each

Part Number: HLY-558-219

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

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: Aug 21, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Wiring Harnesses, Holley EFI, Ford 2V/4V Modular, Main Harness, Multi-port Fuel Injection, for HP, Dominator, EFI Systems, Ford, 4.6-5.4L, Each

Part Number: HLY-558-108

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Fuel Injection System Wiring Harnesses, Holley EFI, Terminator, Throttle Body Systems, Plug-and-Play, Upgrade Harness, for 205 lb./hr. Injectors, Each

Part Number: HLY-558-439

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order