Collection: Wiring Harnesses
Wiring harnesses are essential components that provide electrical connections between various engine components, sensors, & the vehicle's main electrical system. They consist of a network of wires, connectors, & terminals that route power & signals to different engine components, such as the ignition system, fuel injectors, sensors, & other electrical devices. The engine wiring harness ensures that all the electrical components in the engine bay are properly connected & can communicate with each other & the vehicle's main control unit. It is designed to withstand the harsh conditions under the hood, including heat, vibrations, & exposure to chemicals & fluids. In addition to providing reliable electrical connections, engine wiring harnesses also play a crucial role in organizing & routing the wiring in a neat & organized manner, simplifying troubleshooting & maintenance tasks. If any issues arise with the engine's electrical system, such as faulty connections or damaged wires, the wiring harness may need to be repaired or replaced. Upgrading to aftermarket engine wiring harnesses can also be done to support engine modifications or to improve overall electrical performance.
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HOLLEY J2B Auxiliary Harness Kit 558-402
Part # 558-402Vendor:HOLLEYRegular price $197.95 USDRegular price$217.75 USDSale price $197.95 USDSale -
HOLLEY Hemi Coil Harness Late TYCO 558-311
Part # 558-311Vendor:HOLLEYRegular price $179.95 USDRegular price$197.95 USDSale price $179.95 USDSale -
HOLLEY Injector Harness Ford w/ Jetronic Injectors 558-213
Part # 558-213Vendor:HOLLEYRegular price $224.95 USDRegular price$247.45 USDSale price $224.95 USDSale -
HOLLEY Injector Harness - Ford USCAR/EV6 Style Injector 558-212
Part # 558-212Vendor:HOLLEYRegular price $219.95 USDRegular price$241.95 USDSale price $219.95 USDSale -
HOLLEY Injector Harness V8 Evenly Spaced USCAR 558-210
Part # 558-210Vendor:HOLLEYRegular price $224.95 USDRegular price$247.45 USDSale price $224.95 USDSale -
HOLLEY J4 Connector & Harness 558-404
Part # 558-404Vendor:HOLLEYRegular price $224.95 USDRegular price$247.45 USDSale price $224.95 USDSale -
HOLLEY GM LS Coil Sub Harnesses 558-321
Part # 558-321Vendor:HOLLEYRegular price $179.95 USDRegular price$197.95 USDSale price $179.95 USDSale -
HOLLEY Injector Wiring Harness V8 Bosch Style Injectors 558-200
Part # 558-200Vendor:HOLLEYRegular price $179.95 USDRegular price$197.95 USDSale price $179.95 USDSale -
HOLLEY EFI Injector Harness - Universal Unterminated 558-204
Part # 558-204Vendor:HOLLEYRegular price $254.95 USDRegular price$280.45 USDSale price $254.95 USDSale -
HOLLEY Sniper 2 Main Harness w/Fuel Pump Relay 558-191
Part # 558-191Vendor:HOLLEYRegular price $191.65 USDRegular price$210.82 USDSale price $191.65 USDSale -
HOLLEY Auxiliary Harness J2A Connector 558-401
Part # 558-401Vendor:HOLLEYRegular price $257.95 USDRegular price$283.75 USDSale price $257.95 USDSale -
HOLLEY HP EFI Sub-Harnesses - Smart Coil 558-312
Part # 558-312Vendor:HOLLEYRegular price $279.95 USDRegular price$307.95 USDSale price $279.95 USDSale -
HOLLEY Dominator EFI DBW Harness - Early Truck 558-429
Part # 558-429Vendor:HOLLEYRegular price $303.95 USDRegular price$334.35 USDSale price $303.95 USDSale -
HOLLEY Drive By Wire Harness GM 558-406
Part # 558-406Vendor:HOLLEYRegular price $224.95 USDRegular price$247.45 USDSale price $224.95 USDSale -
HOLLEY Coil-Near-Plug Sub Harness - Big Wire 558-318
Part # 558-318Vendor:HOLLEYRegular price $258.25 USDRegular price$284.08 USDSale price $258.25 USDSale -
HOLLEY Wiring Harness Chrysler 46RE Trans Control 558-473
Part # 558-473Vendor:HOLLEYRegular price $310.95 USDRegular price$342.05 USDSale price $310.95 USDSale -
HOLLEY DBW Throttle Harness Ford 5.0L Coyote 11-17 558-422
Part # 558-422Vendor:HOLLEYRegular price $275.95 USDRegular price$310.95 USDSale price $275.95 USDSale -
HOLLEY Injector Harness - 16 Injectors - Unterminated 558-207
Part # 558-207Vendor:HOLLEYRegular price $299.95 USDRegular price$329.95 USDSale price $299.95 USDSale -
HOLLEY Wiring Harness - EFI Digital Dash I/O Adapter 558-433
Part # 558-433Vendor:HOLLEYRegular price $393.95 USDRegular price$433.35 USDSale price $393.95 USDSale -
HOLLEY Flying Lead Main Harness 558-126
Part # 558-126Vendor:HOLLEYRegular price $382.95 USDRegular price$421.25 USDSale price $382.95 USDSale -
HOLLEY Main Harness - Univesal Un-Terminated 558-105
Part # 558-105Vendor:HOLLEYRegular price $595.95 USDRegular price$655.55 USDSale price $595.95 USDSale -
HOLLEY Main Harness - Universal MPFI 558-104
Part # 558-104Vendor:HOLLEYRegular price $475.95 USDRegular price$523.55 USDSale price $475.95 USDSale -
HOLLEY Universal MPFI Coil On Plug Main Harness 558-117
Part # 558-117Vendor:HOLLEYRegular price $674.95 USDRegular price$742.45 USDSale price $674.95 USDSale -
HOLLEY Ford MPFI Coil On Plug Main Harness 558-118
Part # 558-118Vendor:HOLLEYRegular price $649.95 USDRegular price$714.95 USDSale price $649.95 USDSale