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  • 558-415.jpg
    Holley EFI
    Terminator® Throttle Body Harness
    $214.00
    $214.00
    $214.00
    Terminator® Throttle Body Harness; Replacement Wiring Harness For Use w/PN[550-405/550-406];
  • 558-414.jpg
    Holley EFI
    Engine Control Module (ECM) Wiring Harness
    $414.00
    $414.00
    $414.00
    Terminator® EFI Wiring Harness; Replacement Harness For Use w/PN[550-405/550-406];
  • 558-411.jpg
    Holley EFI
    GM Dual Throttle Body Drive-By-Wire Harness;
    $303.00
    $303.00
    $303.00
    GM Dual Throttle Body Drive-By-Wire Harness;
  • 558-409.jpg
    Holley EFI
    Computer Chip Programmer Input Cable
    $65.35
    $72.61
    $65.35
    7 long sealed USB data cable. This cable is included with the purchase of an HP or Dominator ECU.
  • 558-410.jpg
    Holley EFI
    Terminated Crank/Cam Trigger Ignition Harness
    $89.99
    $89.99
    $89.99
    Crank/Cam Ign. Harness. Fully terminated harness. Connects to Holley 60-2 crank sensor and GM Cam-Sync Distributor AC Delco PN213-350 or eficonnection.com sync pulse distributor
  • 558-408.jpg
    Holley EFI
    Fuel Injector Connector And Pin Kit
    $168.95
    $188.00
    $168.95
    j2A, j2B, j3, j4 Connector & Pin Kit - Contains connectors & pins, but no wiring. for Dominator EFI
  • 558-407.jpg
    Holley EFI
    Dominator EFI Multi Map Selector; Incl. 4 Position Switch; Harness And Plug;
    $124.95
    $139.00
    $124.95
    Dominator EFI Multi Map Selector; Incl. 4 Position Switch; Harness And Plug;
  • 558-406.jpg
    Holley EFI
    Dominator EFI GM Drive By Wire Harness;
    $209.95
    $234.00
    $209.95
    Dominator EFI GM Drive By Wire Harness;
  • 558-405_0118305.jpg
    Holley EFI
    Fuel Injection Wire Harness
    $235.95
    $263.00
    $235.95
    GM 4L60/80E Transmission Harness - Complete terminated harness with j4 connector to operate GM electronic transmissions. for Dominator EFI
  • 558-404.jpg
    Holley EFI
    Dominator EFI Connector J4 Auxiliary Harness;
    $162.95
    $182.00
    $162.95
    J4 ECU Connector26 User Programmable Inputs and Outputs
  • 558-403.jpg
    Holley EFI
    Dominator EFI Connector J3 Auxiliary Harness;
    $130.95
    $146.00
    $130.95
    J3 ECU Connector17 User Programmable Inputs and Outputs
  • 558-402.jpg
    Holley EFI
    Dominator EFI Connector J2B Auxiliary Harness;
    $146.00
    $146.00
    $146.00
    J2B Connector Four Additional Injector Driver Outputs Four Additional Coil Driver Outputs23 User Programmable Outputs
  • 558-401.jpg
    Holley EFI
    Dominator EFI Connector J2A Auxiliary Harness;
    $195.95
    $218.00
    $195.95
    Used when adding a second wide band oxygen sensor to a Dominator EFI installation.
  • 558-400.jpg
    Holley EFI
    Connector J1A/B Input/Outputs Auxiliary Harness
    $93.80
    $105.00
    $93.80
    Great for applications requiring minimal Input/output wiring.4 Output Wires4 Input Wires
  • 558-326_01.jpg
    Holley EFI
    LS Ignition Coil Harness; 36 in. Long Extension;
    $103.00
    $103.00
    $103.00
    Designed to extend your factory coil harness, allowing you to easily remote mount your LS ignition coils. These 36 in. long ignition coil extension harnesses are perfect for anyone wanting to remot...
  • 565-300k_09.jpg
    Holley EFI
    Sniper EFI Hyperspark Harness; Plug And Play;
    $167.00
    $167.00
    $167.00
    Our HyperSpark Master Kits were designed to make upgrading your ignition on a Sniper EFI-equipped engine simple. When installed concurrently with a new Sniper EFI system, the combination creates th...
  • 558-325_02.jpg
    Holley EFI
    Pro-Billet Ignition Adapter; For Use w/Terminator X EFI;
    $28.89
    $32.10
    $28.89
    Designed to plug and play with MSD Pro-Billet distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104.
  • 558-323_0119269.jpg
    Holley EFI
    Hyperspark Ignition Adapter
    $29.46
    $32.73
    $29.46
    Designed to plug and play with HyperSpark distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104.
  • 558-321_0118129.jpg
    Holley EFI
    LS Ignition Coil Harness; Factory Replacement For Stock LS Coils;
    $185.00
    $185.00
    $185.00
    Are you tired of scouring the junkyard for stock ls coil sub harnesses? Introducing the new Holley EFI LS Coil Sub Harness. This coil sub harness is intended to be used with factory LS coils and va...
  • 558-322_0118236.jpg
    Holley EFI
    TI-VCT Coil ECM Wire Harness; Ignition Harness Type;
    $208.00
    $208.00
    $208.00
    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...
  • 558-319_011812.jpg
    Holley EFI
    Holley EFI Ford Coyote TI-VCT Main Power Wiring Harness
    $113.00
    $113.00
    $113.00
    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...
  • 558-318.jpg
    Holley EFI
    Coil-Near-Plug Ignition Sub Harness
    $208.95
    $233.00
    $208.95
    "Big Wire" Sub Harness- pre wired with 12ga power and grounds, for optimal performance!
  • 558-317.jpg
    Holley EFI
    Holley Ignition Coil Harness; For Use w/Ford Coyote Engines w/HP/Dominator;
    $190.00
    $190.00
    $190.00
    Holley Ignition Coil Harness; For Use w/Ford Coyote Engines w/HP/Dominator;
  • 558-315.jpg
    Holley EFI
    Holley Ignition Coil Harness; For Use w/Ford 4V Modular Engines;
    $179.95
    $200.00
    $179.95
    Coil harness for 99-04 4 Valve Ford Modular (4.6 & 5.4L) Engines.

Showing 601 -624 of 1503 items