Availability
Wiring Harness, Fuel Injection, Multi-Port, Mass Airflow, Chevy, 5.7L, Each
Part Number: PRF-60608
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Multi-port Injection, Mass Airflow Meter, LS3 w/4L65E Trans Only, Throttle by Wire, Chevy, Kit
Part Number: PRF-60524
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harnesses, Holley EFI, Main Harness, 58X LS TBI, for Terminator, Terminator Stealth, Throttle Body Systems, Chevy, Each
Part Number: HLY-558-112
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, Holley EFI, Pro-Dash, Input/Output, Unterminated, 2 and 3 Conductor Cable, 10 ft. Long, Pins, Plugs, Each
Part Number: HLY-558-456
Estimated Ship Date: Today
Estimated Ship Date: Today
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
Estimated Ship Date: Today
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
Estimated Ship Date: Today
Estimated Ship Date: Today
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: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
Fuel Injection System Wiring Harnesses, Holley EFI, Fuel Injector Harness, Unterminated, Bosch Style, for HP, Dominator EFI Systems, Universal, Each
Part Number: HLY-558-204
Estimated Ship Date: Today
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
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, Holley EFI, Terminator Stealth 2x4, Upgrade Main Harness, Plug-and-Play, Universal, Kit
Part Number: HLY-558-121
Not Yet Reviewed
Estimated Ship Date: Today
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
Estimated Ship Date: Today
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
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, Holley EFI, Ford Coyote, Drive-By-Wire Harness, Multi-port Style, for HP/Dominator EFI System, Ford, 5.0L, Kit
Part Number: HLY-558-422
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
PRO 550 V8 COMPLETE HARNESS
Part Number: FCH-3026109037
Not Yet Reviewed
Estimated Ship Date: Jan 19, 2026 if ordered today
Estimated Ship Date: Jan 19, 2026 if ordered today
Wiring Harness, Fuel Injection System, Standalone, Drive-By-Wire, LS1, Kit
Part Number: TSN-WH1210
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel Injection System Wiring Harness, Flex Fuel Sensor Pigtail, 6.00 in., Multi-Port, Chevy, LS, Each
Part Number: ICB-WPFLX40
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harnesses, Holley EFI, Benchtop Harness, Test Harness, EFI Input Connectors, Power Switch, for HP, Dominator, Terminator, Sniper ECUs, Each
Part Number: HLY-558-127
Not Yet Reviewed
Estimated Ship Date: Today
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
Estimated Ship Date: Today
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
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, EFI CAN Splitters, 48 in. Length, for Use with Holley Terminator X or Sniper EFI Systems, Each
Part Number: SUM-890521
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, EFI Transplant, Multi-Port, Mass Airflow, Extra-Long, Ford, Small Block, Each
Part Number: PRF-60511
Estimated Ship Date: Today
Estimated Ship Date: Today
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
Estimated Ship Date: Today
Wiring Harness, Fuel Injection, GM, TPI, Engine Swap, Universal, Kit
Part Number: PRF-60102
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, EV6 Unterminated, Injector Harness, 36 in. Long, with Pins, Seals, Connector, Kit
Part Number: HLY-558-216
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel pressure regulator harness, 6.6L Duramax, Each
Part Number: FLE-S0432
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
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