{"title":"EFI Connection Harnesses","description":"\u003cp\u003eOur own stand-alone, plug and play, and custom engine harnesses for Holley EFI systems are a value difficult to match. With production tooling, ultrasonic splices, genuine components, and wire color correct construction, you'll have no issues using our products with other Holley brand components.\u003c\/p\u003e","products":[{"product_id":"efi-connection-24x58x-sbc-stand-alone-engine-wire-harness-for-holley-efi-ecu","title":"EFI Connection 24x\/58x SBC Stand-Alone Engine Wire Harness for Holley EFI ECU","description":"\u003cp\u003eThis EFI Connection 24x\/58x SBC Stand-Alone Engine Wire Harness for Holley EFI ECU is built in-house using the highest quality materials, production crimp tools, and ultrasonic welded splices.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eApproximately 5ft from ECU to back of bank 2 cylinder head (cylinder 8).\u003c\/li\u003e\n\u003cli\u003eIncludes main power harness for Holley HP, Dominator, Terminator X, or Terminator X ECU.\u003c\/li\u003e\n\u003cli\u003eInjector harness is integrated into engine harness. No sub harness necessary.\u003c\/li\u003e\n\u003cli\u003eIncludes breakout input\/output connection for Holley add-on harness.\u003c\/li\u003e\n\u003cli\u003eIncludes 4 way \"Power Tap\" connection for Holley add-on harness.\u003c\/li\u003e\n\u003cli\u003eMinimal customization available. Contact us for details.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115736203398,"sku":"100-02107","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-02107.jpg?v=1770901884"},{"product_id":"efi-connection-24x58x-lt1-stand-alone-engine-wire-harness-for-holley-efi-ecu","title":"EFI Connection 24x\/58x LT1 Stand-Alone Engine Wire Harness for Holley EFI ECU","description":"\u003cp\u003eThis EFI Connection 24x\/58x LT1 Stand-Alone Engine Wire Harness for Holley EFI ECU is built in-house using the highest quality materials, production crimp tools, and ultrasonic welded splices.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eApproximately 5ft from ECU to back of bank 2 cylinder head (cylinder 8).\u003c\/li\u003e\n\u003cli\u003eIncludes main power harness for Holley HP, Dominator, Terminator X, or Terminator X ECU.\u003c\/li\u003e\n\u003cli\u003eInjector harness is integrated into engine harness. No sub harness necessary.\u003c\/li\u003e\n\u003cli\u003eIncludes breakout input\/output connection for Holley add-on harness.\u003c\/li\u003e\n\u003cli\u003eIncludes 4 way \"Power Tap\" connection for Holley add-on harness.\u003c\/li\u003e\n\u003cli\u003eMinimal customization available. Contact us for details.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115736236166,"sku":"100-02108","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-02108.png?v=1770901890"},{"product_id":"1993-1997-camaro-firebird-direct-fit-engine-harness-for-holley-terminator-x-hp-terminator-x-max-or-dominator-ecu","title":"1993-1997 Camaro Firebird Direct Fit Engine Harness for Holley Terminator X, HP, Terminator X Max, or Dominator ECU","description":"\u003cp\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/files\/100-05000_Installation_Guide.pdf?v=1742215567\" target=\"_blank\"\u003e\u003cimg style=\"height: 50px;\" title=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/files\/pdf.png?v=1585326324\" alt=\"\"\u003e DOWNLOAD INSTALLATION GUIDE\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIMPORTANT - A Holley EFI system upgrade deserves pre-planning to be sure you will achieve all that you expect for your project. A Holley EFI system should be considered stand-alone with certain add-on features that may or may not offer integration with your vehicle.\u003c\/strong\u003e  \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eThis harness is for use with 1993-1997 Camaro or Firebird with LT1 engine when using a Holley EFI ECU (HP, Dominator, Terminator X, or Terminator X Max).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRequires engine to be equipped with a crank and cam signal conversion compatible with Holley EFI ECUs.\u003c\/li\u003e\n\u003cli\u003eHarness assumes engine is using an EFI Connection 24x\/1x crank\/cam signal conversion. Contact us if you have a different crank\/cam signal conversion. We can offer adapter harness(es) for your application.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eHow is this harness different than a Holley EFI main engine harness?\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect fit into 1993-1997 Camaro and Firebird. Our harness is designed to fit the engine bay and connect with the vehicle's original wiring (like body-side harness connectors C100, C105, C210, C220, C230). With Holley's main engine harness being nearly 3 feet too long, there's no where to hide their extra wires.\u003c\/li\u003e\n\u003cli\u003eEV1 injector wiring is integrated into the harness. No injector sub harness involved.\u003c\/li\u003e\n\u003cli\u003eCrank sensor wiring designed to fit the crank sensor from within the timing cover.\u003c\/li\u003e\n\u003cli\u003eCam sensor wiring designed to fit the cam sensor from within the timing cover.\u003c\/li\u003e\n\u003cli\u003eMAP sensor wiring designed to fit the LT1 MAP sensor.\u003c\/li\u003e\n\u003cli\u003eKnock sensor wiring designed to fit the LT1 knock sensor.\u003c\/li\u003e\n\u003cli\u003eTPS wiring designed to fit the LT1 TPS.\u003c\/li\u003e\n\u003cli\u003eHarness routing follows the LT1 engine layout (and not the LS engine layout).\u003c\/li\u003e\n\u003cli\u003eElectric fans operation is integrated.\u003c\/li\u003e\n\u003cli\u003eStarter crank wiring is integrated.\u003c\/li\u003e\n\u003cli\u003eOil pressure gauge wiring is integrated.\u003c\/li\u003e\n\u003cli\u003eCoolant temperature gauge wiring is integrated.\u003c\/li\u003e\n\u003cli\u003eOil level switch wiring is integrated.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this harness similar to a Holley EFI main engine harness?\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFollows Holley wire colors for any future troubleshooting.\u003c\/li\u003e\n\u003cli\u003eIncludes the same specialty shielded crank, cam, and wide band O2 wires.\u003c\/li\u003e\n\u003cli\u003eManufactured with production tooling (not general repair tooling).\u003c\/li\u003e\n\u003cli\u003eAll splices are ultrasonically welded (not soldered).\u003c\/li\u003e\n\u003cli\u003eIncludes the same 10 way Metri-Pack I\/O connection for support with Holley's Inputs\/Outputs harnesses.\u003c\/li\u003e\n\u003cli\u003eIncludes the same 4 way Metri-Pack Power Tap connection for easy sensor add-on capability.\u003c\/li\u003e\n\u003cli\u003eIncludes the same 4 way Molex CAN bus connection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSo is this harness plug and play?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis harness is plug and play with the LT1 engine. Remove original LT1 engine harness, install this engine harness, set the initial ECU calibration, turn the ignition key and the engine will run. The following additional considerations are necessary:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInstrument cluster speedometer support may require a Dakota Digital SGI-5E module.\u003c\/li\u003e\n\u003cli\u003eInstrument cluster tachometer support may require a Dakota Digital SGI-8E module.\u003c\/li\u003e\n\u003cli\u003eHolley HP ECU and Terminator X ECU are not compatible with the Camaro Firebird two-wire VSS.\u003c\/li\u003e\n\u003cli\u003e4L60E and two-wire VSS support require Holley Dominator ECU or Terminator X Max ECU.\u003c\/li\u003e\n\u003cli\u003eECU control of air conditioning will require use of available inputs\/outputs.\u003c\/li\u003e\n\u003cli\u003eECU control of reverse lockout solenoid (T56) will require use of available inputs\/outputs.\u003c\/li\u003e\n\u003cli\u003eECU control of EVAP purge solenoid will require use of available inputs\/outputs.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115739185286,"sku":"100-05000","price":850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-05000.png?v=1770902077"},{"product_id":"1993-1997-camaro-firebird-bare-bones-harness-minus-fuel-injection","title":"1993-1997 Camaro Firebird Bare Bones Harness Minus Fuel Injection","description":"\u003cp\u003e\n  \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.eficonnection.com\/assets\/ProductFiles\/100-02351-Installation-Guide.pdf\" target=\"_blank\"\u003e\n    \u003cimg style=\"width: auto !important; max-width: 50px !important; height: 50px !important; object-fit: contain; float: left; margin-right: 10px;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/files\/pdf.png?v=1585326324\" alt=\"PDF\"\u003e\n    DOWNLOAD INSTALLATION GUIDE\n  \u003c\/a\u003e\n\u003c\/p\u003e\n\u003cp\u003eThis is an EFI Connection exclusive harness we are excited to offer to enthusiasts who want to use a Holley EFI system with Holley's stand-alone engine wire harness. Think of this harness as a 1993-1997 Camaro or Firebird engine harness that excludes fuel injection while retaining the following features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlternator (generator) connection and control through the instrument cluster.\u003c\/li\u003e\n\u003cli\u003eCoolant temperature sending unit connection for instrument cluster gauge.\u003c\/li\u003e\n\u003cli\u003eOil pressure sending unit connection for instrument cluster gauge.\u003c\/li\u003e\n\u003cli\u003eOil level switch connection for instrument cluster telltale lamp.\u003c\/li\u003e\n\u003cli\u003eVSS connection for instrument cluster speedometer function (requires Dakota Digital SGI-5E module).\u003c\/li\u003e\n\u003cli\u003eTachometer signal for instrument cluster tachometer function (requires Dakota Digital SGI-5E module).\u003c\/li\u003e\n\u003cli\u003eBackup lamp switch connector for T56 transmission equipped vehicles.\u003c\/li\u003e\n\u003cli\u003eElectric fans low speed operation.\u003c\/li\u003e\n\u003cli\u003eElectric fans high speed operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConstructed in-house with all new Aptiv (formerly Delphi) components using production crimp tooling and ultrasonic ground splice. The harness is finished with high temperature fiberglass sleeving and split braided wrap to match the appearance of Holley's engine wire harness.\u003c\/p\u003e","brand":"EFI","offers":[{"title":"Default Title","offer_id":43115753439366,"sku":"100-02351","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/files\/100-02351.png?v=1770902590"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/4638\/8614\/collections\/No-Image-Available-2_24de52a6-2cc9-43b8-929e-fb0c4eec616c.png?v=1790164471","url":"https:\/\/www.eficonnection.com\/collections\/efi-connection-harnesses.oembed","provider":"EFI Connection","version":"1.0","type":"link"}