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  • 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...
  • largemainharness558_104.jpg
    Holley EFI
    Universal Multi-Point Main Harness
    $446.95
    $497.00
    $446.95
    Universal Multi-Point Main Harness; For Avenger EFI/HP EFI/Dominator EFI Systems;
  • mainharness.jpg
    Holley EFI
    Fuel Injection Wire Harness
    $593.00
    $593.00
    $593.00
    This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly found in 2006+ Year Model vehicles with LS variants such as the: LS2,LS3,LS7,L76,L92, and L98.
  • 558-101.jpg
    Holley EFI
    TPI/Stealth Ram Main Harness; For Avenger EFI/HP EFI/Dominator EFI Systems;
    $514.00
    $514.00
    $514.00
    TPI/Stealth Ram Main Harness; For Avenger EFI/HP EFI/Dominator EFI Systems;
  • 558-102.jpg
    Holley EFI
    Fuel Injection Wire Harness
    $532.95
    $593.00
    $532.95
    Fuel Injection Wire Harness; Fits w/1997-2004 LS 1/6 Engines w/24x Crank/1x Cam Sensor And w/HP EFI/ Dominator EFI Systems;
  • 557-201_0118339.jpg
    Holley EFI
    BoostCntrlSolenoid
    $381.95
    $425.00
    $381.95
    Introducing the newest development from the Holley EFI engineering team. The Holley EFI High Flow Dual Port Boost Control Kit. This kit contains a set of pre-installed high flow solenoids, which fe...
  • 557-200.jpg
    Holley EFI
    Boost Control Solenoid; 3 Port Boost Control Solenoid Valve;
    $142.95
    $159.00
    $142.95
    3 Port Boost Control Solenoid Valve Includes: (1) solenoid, (1) ECU pigtail harness with factory crimped ECU pin, (3) 3/16 in. barb fittings, (1) 1/8 in. NPT plug, (1) Sintered brass muffler. and...
  • 557-107.jpg
    Holley EFI
    Water / Methanol Injection Filter
    $37.89
    $37.89
    $37.89
    Take your forced induction ride to the next level with a Holley water/meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water/methanol inje...
  • 557-103_105_106.jpg
    Holley EFI
    Water/Methanol Injection Solenoid/Nozzle; 1000cc/min; 800 hp;
    $323.95
    $360.00
    $323.95
    Take your forced induction ride to the next level with a Holley water/meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water/methanol inje...

Showing 673 -696 of 1505 items