Availability
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, 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 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 pressure regulator harness, 6.6L Duramax, Each
Part Number: FLE-S0432
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, Holley EFI, Coyote Ti-VCT, Main Harness, Plug-and-Play, Drive-by-Wire, with Holley Smart Coils, Ford, 5.0L Kit
Part Number: HLY-558-122
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, CAN Adapter Harness, Male to Female Adapter, 12 in. Long, for Racepak or CAN Device, Each
Part Number: HLY-558-451
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harnesses, Holley EFI, Coyote, with TI-VCT/Stock Coils, Main Harness, MPFI, for HP, Dominator, EFI Systems, Ford, 5.0L, Each
Part Number: HLY-558-110
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Extension Harness, Intake Air Temperature, 2013 - 2017 6.7L Cummins, Each
Part Number: FLE-S0397
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Flex Fuel Sensor Harness, Buick, Cadillac, Chevy, GMC, Each
Part Number: NAL-13352241
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Fuel Injector Sub-Harness, EV6, Nexus Rebel LS, Chevrolet, LS, Each
Part Number: HTH-HT-186502
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
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: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, Gen III Hemi, Injector Harness, Bosch/Jetronic/Holley, for HP, Dominator EFI, Each
Part Number: HLY-558-211
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
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: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
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: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
Harness Adapter, IAC to FAST EFI, Chevy, Pontiac, Each
Part Number: FST-308023
Estimated Ship Date: Today
Estimated Ship Date: Today
Fuel Injection System Wiring Harnesses, Holley EFI, Hemi Drive-By-Wire, Throttle Body Harness, for Holley Dominator EFI Only, Dodge, 5.7-6.4L, Each
Part Number: HLY-558-437
Not Yet Reviewed
Estimated Ship Date: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
Wiring Harnesses, Holley EFI, Replacement Harness, Multi-Port, Speed Density Metered, for Avenger, HP, Dominator, EFI Systems, with Stealth Ram, Each
Part Number: HLY-558-101
Not Yet Reviewed
Estimated Ship Date: Jan 21, 2026 if ordered today
Estimated Ship Date: Jan 21, 2026 if ordered today
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