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Harness the power and exceptional drivability of fuel injection for your ride. Our selection of fuel injection wiring harnesses makes it easy to bring throttle body,...
Harness the power and exceptional drivability of fuel injection for your ride. Our selection of fuel injection wiring harnesses makes it easy to bring throttle body, multi-port, or sequential multi-port fuel injection to your vehicle. Whether you’re adding an aftermarket fuel injection system to your existing engine, swapping in a completely new fuel-injected engine, or just replacing old wiring, we’ve got what you need. We carry complete EFI wiring harnesses from Holley, FAST, Ron Francis Wiring, Accel, Painless Performance, and many others. Bring fuel injection to darn near anything—vintage hot rods,...
Harness the power and exceptional drivability of fuel injection for your ride. Our selection of fuel injection wiring harnesses makes it easy to bring throttle body, multi-port, or sequential multi-port fuel injection to your vehicle. Whether you’re adding an aftermarket fuel injection system to your existing engine, swapping in a completely new fuel-injected engine, or just replacing old wiring, we’ve got what you need. We carry complete EFI wiring harnesses from Holley, FAST, Ron Francis Wiring, Accel, Painless Performance, and many others. Bring fuel injection to darn near anything—vintage hot rods, street rods, replica cars, or whatever—with fuel injection system wiring harnesses from Summit Racing.
Showing In Stock Items. Show All 286 Items.
Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, LSX Injector Harness, EV6 Style, for HP, Dominator, Terminator EFI Systems, Each
Part Number: HLY-558-201
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
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Fuel Injection System Wiring Harnesses, EFI CAN Splitters, 12 in. Length, for Use with Holley Terminator X or Sniper EFI Systems, Each
Part Number: SUM-890520
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Fuel Injection Systems Wiring Harnesses, Holley EFI, Drive-by-Wire Harness, GM LSx, for Dominator EFI Systems, 6-Pin, Each
Part Number: HLY-558-406
Not Yet Reviewed
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
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: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Fuel Injection, Multi-Port, Mass Airflow, Chevy, 4.8/5.3/6.0L, Kit
Part Number: PRF-60221
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Wiring Harness, Fuel Injection, for Engine Swaps, Multi-Port, Mass Airflow, with 10 Circuit Fuse Block/GM Colors, Chevy, LS 4.8, 5.3, 6.0L, Each
Part Number: PRF-60217
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
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
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Fuel Injection System, Standalone, Drive-By-Cable, LS1, Kit
Part Number: TSN-WH1201
Not Yet Reviewed
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
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: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Fuel Injection, GM, SFI, LS1, Engine Swap, Front Mount Fuse Block, Standard Length, Universal
Part Number: PRF-60508
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Fuel Injection System Wiring Harness, Holley EFI, Main Power, Universal, Speed Density/Throttle, 13 ft. Long, for Avenger, HP, Dominator EFI, Kit
Part Number: HLY-558-308
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Holley EFI, V8 Over Manifold, Bosch Injector Harness, for Avenger, Dominator, HP EFI Systems, Chrysler, GM, Cylinder Orientation, Kit
Part Number: HLY-558-200
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Sniper 2 EFI Main Battery Harness, With PDM, Each
Part Number: SNE-558-190
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Fuel Injection Systems Wiring Harnesses, Dominator EFI, J2A Auxiliary Harness, MPFI, Speed Density/Throttle Metered, with Wideband O2 Sensor, Kit
Part Number: HLY-558-401
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
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: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, EFI Transplant, Multi-Port, Mass Airflow, Standard Length, Ford, Small Block, Each
Part Number: PRF-60510
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Wiring Harness, Fuel Injection, GM, MFI, Front Mount Fuse Block, Spade Fuse, 4L60E Trans, Universal, Kit
Part Number: PRF-60502
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
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: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Fuel Injection, GM, CFI/TBI, Engine Swap, Universal, Kit
Part Number: PRF-60101
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Wire Harnesses, Sniper EFI, HyperSpark, Main Harness, Throttle Body Injection, Plug-n-Play, 40 amp Relay Included, Each
Part Number: SNE-558-328
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Engine Wiring Harness, Engine Swap, Front Fuse Block, Standard Length, Chevy, 454, Kit
Part Number: PRF-60211
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Wire Harnesses, Sniper EFI, Main Harness, Throttle Body Injection, Speed Density Metered, 6 ft. Wire Loom, Black, Split Braided, Kit
Part Number: SNE-558-490
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wire Harnesses, Sniper EFI, Input/Output Harness, Throttle Body Injection, Speed Density Metered, 10-pin Male Connector, Kit
Part Number: SNE-558-491
Not Yet Reviewed
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
This product may not be eligible for select promotional offers
Wiring Harness, Cummins Diesel, 5.9L, Facilitates Engine Transplants, Each
Part Number: PRF-60250
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
Wiring Harness, Gen III Vortec, Chevy, 4.8/5.3/6.0L, Each
Part Number: PRF-60218
Estimated Ship Date: Tuesday 9/2/2025
Estimated Ship Date: Tuesday 9/2/2025
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Summit Racing™ EFI CAN Splitters SUM-890520
