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  • 558-201.jpg
    Holley EFI
    LSx Fuel Injection Harness
    $138.95
    $155.00
    $138.95
    Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro–Stock champion. Holleys products include...
  • 558-202.jpg
    Holley EFI
    Fuel Injection Wire Harness
    $109.00
    $109.00
    $109.00
    This is a replacement 8 cylinder injector harness. It connects the main harness to the fuel injectors. It routes the wires under the plenum.
  • injectorharness.jpg
    Holley EFI
    Bosch Style Connector Harness
    $162.95
    $182.00
    $162.95
    Bosch Style Connector Harness; V8 Over Manifold; For Avenger EFI/HP EFI/Dominator EFI Systems;
  • 558-134_01.jpg
    Holley EFI
    Holley EFI LS Main Harness
    $556.00
    $556.00
    $556.00
    These harnesses are designed to fit most 24x and 58x LS engines, from 1997-2012. They are a perfect fit for installers wanting to mount the any Holley EFI ECU inside of the passenger compartment wh...
  • 558-133_01.jpg
    Holley EFI
    Holley EFI LS Main Harness
    $556.00
    $556.00
    $556.00
    This harness is designed for LS1/6 Engines, from 1997-2004. This harness interfaces with 24x Crank and 1x Cam sensors.
  • 558-132_01.jpg
    Holley EFI
    Terminator X Sub-Harness; For Use w/Gen III Hemi VVT/SRV;
    $119.95
    $134.00
    $119.95
    2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Terminator X and Terminator X Max ECUs will allow you to control and tune the VVT with the use o...
  • 558-131_01.jpg
    Holley EFI
    Terminator X Sub-Harness; For Use w/Gen III Hemi VVT;
    $105.00
    $105.00
    $105.00
    2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Terminator X and Terminator X Max ECUs will allow you to control and tune the VVT with the use o...
  • 558-128.jpg
    Holley EFI
    Holley EFI Engine Main Harness; For Use w/5.0 Small Block Ford Engines;
    $473.95
    $527.00
    $473.95
    This harness is for fuel injected small block ford engines, such as 5.0L, or 5.8L Windsor powerplants. Plug and play ignition capability with Dual Sync and HyperSpark Distributors, ignition adapter...
  • 558-127_01.jpg
    Holley EFI
    Computer Chip Programmer Input Cable
    $176.95
    $197.00
    $176.95
    Designed for benchtop testing and setup of HP, Dominator, Terminator X, Terminator X Max, and Sniper ECUs, as well as 7 in. dashes. Great for ECU diagnostics, firmware updating, or pre-configuring ...
  • 558-126_0118320.jpg
    Holley EFI
    Unterminated Main Engine Wire Harness
    $353.95
    $394.00
    $353.95
    Unterminated Main Engine Wire Harness; Incl. Both J1A and J1B Connectors Full Terminated w/15 ft. Flying Lead Wiring;
  • 558-125_011812.jpg
    Holley EFI
    Holley EFI Ford Coyote TI-VCT Sub Wiring Harness
    $325.00
    $325.00
    $325.00
    Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote jun...
  • 558-124_011812.jpg
    Holley EFI
    Holley EFI Ford Coyote TI-VCT Sub Wiring Harness
    $325.00
    $325.00
    $325.00
    Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote jun...
  • 558-122_011812.jpg
    Holley EFI
    Holley EFI Ford Coyote TI-VCT Engine Main Wiring Harness
    $774.00
    $774.00
    $774.00
    Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote jun...
  • 558-121_011922.jpg
    Holley EFI
    Terminator® Stealth Series Main Harness; 2x4; EFI Upgrade; Plug and Play;
    $407.00
    $407.00
    $407.00
    Introducing 2x4 Terminator Stealth EFI upgrade components. The wait is over. These upgrade components allow you to use your current Terminator Stealth EFI throttle body, install a new main harness,...
  • 558-117.jpg
    Holley EFI
    Universal Coil On Plug Harness
    $475.95
    $529.00
    $475.95
    This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for easy access to 12v, 5v Reference, and Sensor ...
  • 558-118.jpg
    Holley EFI
    Coil On Plug Wire Harness
    $502.95
    $559.00
    $502.95
    This harness provides a plug and play upgrade solution for those seeking to convert to Coil-On-Plug. Additionally we have pre-installed a Power Tap for easy access to 12v, 5v Reference, and Sensor ...
  • 558-107.jpg
    Holley EFI
    Fuel Injection Harness
    $688.00
    $688.00
    $688.00
    Gen III HEMI Harness with TPS and Idle Air Control Connections. This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI engine with an aftermarket cable actuated throttle body. It is mean...
  • 558-106.jpg
    Holley EFI
    Fuel Injection Harness
    $688.00
    $688.00
    $688.00
    Gen III HEMI Harness with TPS and Idle Air Control Connections. This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI engine with an aftermarket cable actuated throttle body. It is mean...
  • 558-113.jpg
    Holley EFI
    Main Power Ignition Harness; For Use w/99-04 Ford Modular w/Smart Coils;
    $661.95
    $736.00
    $661.95
    Main Harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines for use with Holley Smart Coils
  • 558-112.jpg
    Holley EFI
    Terminator® Throttle Body Harness; For Use w/GM LSX w/58x Reluctor Wheel;
    $585.00
    $585.00
    $585.00
    Main Engine harness intended for use with Terminator X, X Max, Terminator, HP, and Dominator ECUs when using a Terminator or Terminator Stealth style Throttle Body Injection unit on a Gen 4 58x LS ...
  • 558-111.jpg
    Holley EFI
    Terminator® Throttle Body Harness; For Use w/GM LSX w/24x Reluctor Wheel;
    $573.00
    $573.00
    $573.00
    Main Engine harness intended for use with Terminator X, X Max, Terminator, HP, and Dominator ECUs when using a Terminator or Terminator Stealth style Throttle Body Injection unit on a Gen 3 24X LS ...
  • 558-110_011812.jpg
    Holley EFI
    Holley EFI Ford Coyote TI-VCT Engine Main Wiring Harness
    $704.00
    $704.00
    $704.00
    Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI! Do you have a coyote crate engine going in your dream car? Is your weekend road race warrior powered by a coyote jun...
  • 558-108.jpg
    Holley EFI
    Fuel Injection Harness
    $674.00
    $674.00
    $674.00
    Injector Harness; Main Harness; For HP Or Dominator EFI; For Use w/94-04 Ford Modular Engines;
  • 558-105.jpg
    Holley EFI
    Unterminated Universal Main Harness; For HP EFI/Dominator EFI Systems;
    $445.95
    $496.00
    $445.95
    Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro–Stock champion. Holleys products include...

Showing 649 -672 of 1503 items