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Holley Performance Carbs & More
Legendary Holley carburetors have powered professional racers to victory for years, and you can bolt the same technology onto your engine. Every Holley carb is built...
Legendary Holley carburetors have powered professional racers to victory for years, and you can bolt the same technology onto your engine. Every Holley carb is built in the USA and 100-percent flow tested for no-hassle, out-of-the-box performance. Holley fuel pumps, fuel injectors, throttle bodies, and EFI system are manufactured using that same proven quality control. Bring a renowned Holley carburetor, fuel pump, or any other high-quality air and fuel system part to your street machine, competition vehicle, boat, or daily driver. Shop Holley at Summit Racing now!
Legendary Holley carburetors have powered professional racers to victory for years, and you can bolt the same technology onto your engine. Every Holley carb is built in the USA and 100-percent flow tested for no-hassle, out-of-the-box performance. Holley fuel pumps, fuel injectors, throttle bodies, and EFI system are manufactured using that same proven quality control. Bring a renowned Holley carburetor, fuel pump, or any other high-quality air and fuel system part to your street machine, competition vehicle, boat, or daily driver. Shop Holley at Summit Racing now!
Showing In Stock Items. Show All 31 Items.
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
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Harness, Sniper 2 EFI Main Battery Harness, With PDM, Each
Part Number: SNE-558-190
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Harnesses, Holley EFI, Universal, Unterminated, Main Harness, Multi-port Fuel Injection, for HP, Dominator, EFI Systems, with Connectors, Each
Part Number: HLY-558-105
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Harnesses, Holley EFI, Replacement, Main Harness, Multi-port Fuel Injection, for HP, Dominator, EFI Systems, Universal, Each
Part Number: HLY-558-104
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Harness, Sniper 2 EFI Main Battery Harness, Without PDM, Each
Part Number: SNE-558-191
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Harnesses, Holley EFI, Main Harness, Unterminated, Flying Lead, 15 ft. Long, J1A/J1B Connectors, Plug Seals Included, Universal, Each
Part Number: HLY-558-126
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 Harnesses, Holley EFI, LS1/6, 24X/1X, Main Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 4.8-6.0L, Each
Part Number: HLY-558-133
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Fuel Injection System Wiring Harnesses, Holley EFI, Multi-port Fuel Injection, Coil-on-Plug, Dual CANbus, for Holley HP, Dominator EFI, Universal, Kit
Part Number: HLY-558-117
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 Harnesses, Holley EFI, Gen III Hemi, Throttle Position, Idle Air Controls, Factory Connectors, Chrysler, Dodge, Jeep, Hemi, Late Model, Each
Part Number: HLY-558-116
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 Harnesses, Holley EFI, LS2/3/7, 58X/4X, Main Harness, Plug-and-Play, Extended Length, for Dominator/HP EFI Systems, Chevy, 6.0-7.0L, Each
Part Number: HLY-558-134
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 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: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Fuel Injection System Components, Holley EFI, Main Harness, Plug-and-Play, Factory PWM/IAC Connectors, with OE Injectors, Ford, Mustang, 5.0L, Each
Part Number: HLY-558-128
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 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: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Wiring Harnesses, Holley EFI, LT4 Engine, Main Harness, for Terminator X, V3 ECU, Cadillac, Chevy, Each
Part Number: HLY-558-130
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 Harnesses, Holley EFI, Gen III Hemi, VVT, SRV, Sub-Harness Only, Plug-and -Play, for Terminator X, Terminator X Max EFI, Dodge, 5.7-6.4L, Each
Part Number: HLY-558-132
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 Harnesses, Holley EFI, Gen V, LT Engine, Main Harness, for Terminator X, Terminator X Max, ECU Only, Chevy, 5.3L, 6.2L, Each
Part Number: HLY-558-129
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
Ignition Coil Wiring Harnesses, Holley EFI, Ford MPFI, Main Harness, Coil-On-Plug, Plug-and-Play, Dual CANbus, Factory Connectors, Ford, 5.0L, Each
Part Number: HLY-558-118
Estimated Ship Date: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered today
Fuel Injection System Components, Holley EFI, Coyote Ti-VCT, Sub-Harness, for Stock Camshafts, with Holley HP, Dominator EFI, Ford, 5.0L, Coyote, Each
Part Number: HLY-558-125
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 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: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered 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: Monday 4/27/2026 if shipped by air
Estimated Ship Date: Monday 4/27/2026 if shipped by air
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: May 12, 2026 if ordered today
Estimated Ship Date: May 12, 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: May 13, 2026 if ordered today
Estimated Ship Date: May 13, 2026 if ordered today
