{"title":"Wiring EFI Harnesses","description":"\u003ch3 data-start=\"175\" data-end=\"238\" class=\"\"\u003eEFI Harnesses – Clean Installs, Reliable Connections\u003c\/h3\u003e\n\u003cp data-start=\"240\" data-end=\"500\" class=\"\"\u003eSimplify your EFI setup with \u003cstrong data-start=\"269\" data-end=\"303\"\u003eplug-and-play wiring harnesses\u003c\/strong\u003e for \u003cstrong data-start=\"308\" data-end=\"320\"\u003eLS swaps\u003c\/strong\u003e, \u003cstrong data-start=\"322\" data-end=\"344\"\u003eHolley EFI systems\u003c\/strong\u003e, and \u003cstrong data-start=\"350\" data-end=\"382\"\u003ecustom fuel injection builds\u003c\/strong\u003e. Designed for clean routing, OE-style fitment, and rock-solid reliability — no wiring guesswork, just plug in and go.\u003c\/p\u003e\n\u003cp data-start=\"502\" data-end=\"551\" class=\"\"\u003e\u003cstrong data-start=\"502\" data-end=\"551\"\u003ePower your project with the right connection.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"digital-dash-vehicle-harness-terminated-558-436","title":"Digital Dash Vehicle Harness - Terminated","description":"\u003cp\u003eTerminated Vehicle Harness For Digital Dash\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Electrical, Lighting and Body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Dashboard Wiring Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Digital Dash Harness \/ Adapter \/ Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/2fbfa8920ccdf84a3abc2699a99455d8fb7888cf.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10954rev2.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246792605789,"sku":"558-436","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/1d46fb3c973998b59d9b40aeced8afcee2edbead.jpg?v=1753422292"},{"product_id":"ford-2v-and-4v-modular-main-harness-558-108","title":"Ford 2V \u0026 4V Modular Main Harness","description":"\u003cp\u003eMain harness for 99-04 2 \u0026amp; 4 Valve Ford Modular (4.6 \u0026amp; 5.4L) Engines.\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Main\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ford Modular Main Engine Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/3e031ad86c7985381d2c0ceda84b4a6fd33ebc6f.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r12028.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/cdd51c562e15df6f5ceb6a3c216674b86c810b06.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 558-108_ford_2v_and_4v_main_harness_diagram.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/f4406892e09b6c9b05db8266dca8711f3ba294c0.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10724rev1.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246802272349,"sku":"558-108","price":849.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/23a66ebb7eae16b05a701a5314a9df3c02730b21.jpg?v=1753422196"},{"product_id":"ford-2v-modular-coil-harness-558-314","title":"Ford 2V Modular Coil Harness","description":"\u003cp\u003eCoil harness for 99-04 2 Valve Ford Modular (4.6 \u0026amp; 5.4L) Engines.\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Ignition Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ford Modular Coil Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Ignition Wire and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246802862173,"sku":"558-314","price":249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/4ee1a6e72becc2a2ae8e16052ac07a51bc01b219.jpg?v=1753422195"},{"product_id":"ford-coyote-coil-harness-558-317","title":"Ford Coyote Coil Harness","description":"\u003cp\u003eCoil Harness for 2011 to 2015 Ford Coyote (5.0L) Engines\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Ignition Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ford Modular Coil Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Ignition Wire and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246804402269,"sku":"558-317","price":233.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/1662a0e022459eec642789bfef5eefe33838c037.jpg?v=1753422186"},{"product_id":"ford-coyote-drive-by-wire-harness-558-422","title":"Ford Coyote Drive-By-Wire Harness","description":"\u003cp\u003eDrive-By-Wire harness for 2011-2017 Ford Coyote (5.0L) engines\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2011-2017 Ford Coyote (5.0L) engines\u003c\/li\u003e\n\u003cli\u003e(3) connectors\u003c\/li\u003e\n\u003cli\u003eDesigned to be used with Ford Throttle Body P\/N's - BR3Z-9E926-C, BR3E-9F991-AB, and FR3E-9F991-AA\u003c\/li\u003e\n\u003cli\u003eDesigned to be used with Ford Throttle Pedal P\/N's - BR3Z-9F836-D and BR3Z-9F836-C\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Drive-By-Wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drive By Wire Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/a5566fb0c233bf290ecee002b9fceefd7552d6d2.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 558-422_ford_coyote_dbw_harness_diagram.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/a9080e9f38a4d6b48e475f6b3f86141229e59cc4.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10739rev1.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246804598877,"sku":"558-422","price":299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/5796e7152a27b18d19dcffa5596251ff21763283.jpg?v=1753422185"},{"product_id":"ford-modular-2-valve-efi-harness-kit-558-505","title":"Ford Modular 2 Valve EFI Harness Kit","description":"\u003cp\u003eThis wiring harness interfaces a Holley EFI ECU to a 2V Modular Ford engine. It is meant to be used in conjunction with an injector harness, a coil harness, and ignition modules. Most stock sensors are used with this harness.\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1999-2004 Ford Modular 2 Valve\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eCan be used with Dominator and HP ECU's\u003c\/li\u003e\n\u003cli\u003eIncludes Main Power Harness, Ford Modular Main Harness, Ford V8 Injector Harness, Ford Modular 2V Coil Harness, and Coil Drivers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e 2v Ford Modular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjector Connector:\u003c\/strong\u003e Jetronic \/ Minitimer (Bosch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit.  This kit is meant to be used in conjunction with an injector harness, a coil harness, and ignition modules.\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/0b8eaa8389d9d1b734a4a0d96bfbaddb00469e16.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - techlibrary_199r10555rev16.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/3e031ad86c7985381d2c0ceda84b4a6fd33ebc6f.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r12028.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/f4406892e09b6c9b05db8266dca8711f3ba294c0.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10724rev1.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246806761565,"sku":"558-505","price":1599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/8bc3b997b8dbc4ebcaac60673027eac3e2a78c00.jpg?v=1753422172"},{"product_id":"ford-modular-2v-and-4v-main-harness-for-use-with-holley-smart-coils-558-113","title":"Ford Modular 2V \u0026 4V Main Harness for use with Holley Smart Coils","description":"\u003cp\u003eMain Harness for 99-04 2 \u0026amp; 4 Valve Ford Modular (4.6 \u0026amp; 5.4L) Engines for use with Holley Smart Coils\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Main\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Ignition Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ford Modular Main Engine Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Ignition Wire and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/068a3d8e75d490a44ba0a71ae54d03113d4f1ad8.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 558-113_ford_2v_and_4v_main_harness_diagram.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/54caa1902bc2b25945619de65a88d3a387ee121a.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r12026.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/957a3562e36e70aacec6d91d31d1329b5a299f90.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10861.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246806990941,"sku":"558-113","price":949.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/b33861d1097a51f62462c300a18a4dc5a84aa047.jpg?v=1753422171"},{"product_id":"ford-v8-injector-harness-558-212","title":"Ford V8 Injector Harness","description":"\u003cp\u003eFord V8 Injector Harness for Ford USCAR \/ EV6 style Fuel Injectors (Evenly Spaced)\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Injector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ford EV6 Style Injector Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246807613533,"sku":"558-212","price":207.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/5ee2ce0a65febe570f33ec5c42e3007cab7141f0.jpg?v=1753422164"},{"product_id":"ford-v8-injector-harness-558-213","title":"Ford V8 Injector Harness","description":"\u003cp\u003eFord V8 Injector Harness for Jetronic \"Bosch\" style Fuel Injectors (Evenly Spaced)\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Injector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ford EV1 Style Injector Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246807744605,"sku":"558-213","price":212.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/436facd10511d75e23422adb8ab117c4b16e68b8.jpg?v=1753422163"},{"product_id":"gm-58x-efi-harness-kit-558-501","title":"GM 58X EFI HARNESS KIT","description":"\u003cp\u003eAn EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system!\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVGM LS2\/LS3\/LS7\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eWorks with Dominator and HP ECU's\u003c\/li\u003e\n\u003cli\u003eIncludes Main Power Harness, LS2 Main Harness, and LSX injector harness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e LSX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit.\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/efi_selection_chart62914.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFI selection chart\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/e820ccdd79f4cd2fdd4effcc8806004e9e6c375a.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10836.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246811349085,"sku":"558-501","price":949.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/ceeb74dcdb5ca4729bec0f42cc18a798c3654c0d.jpg?v=1753422127"},{"product_id":"gm-ls-24x-efi-harness-kit-558-500","title":"GM LS 24X EFI HARNESS KIT","description":"\u003cp\u003eAn EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit for your GM LS engine comes complete with the main harness, power harness and injector harness to support your primary system!\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHarness Kit Includes; Main Power Harness, LS1 Main Harness \u0026amp; V-8 Injector harness\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eWorks with HP or Dominator ECU's\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e LSX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/efi_selection_chart62914.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFI selection chart\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/e820ccdd79f4cd2fdd4effcc8806004e9e6c375a.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10836.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246811611229,"sku":"558-500","price":1065.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/ca9fee4747600dd04adf549afcd38bad5a26c83a.jpg?v=1753422126"},{"product_id":"gm-ls-58x-efi-harness-kit-558-502","title":"GM LS 58X EFI HARNESS KIT","description":"\u003cp\u003eAn EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system!\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHarness Kit Includes; Main Power Harness, LS2 Main Harness \u0026amp; V-8 Injector harness\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eWorks with HP or Dominator ECU's\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e LSX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit.\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/efi_selection_chart62914.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFI selection chart\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/e820ccdd79f4cd2fdd4effcc8806004e9e6c375a.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10836.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246811906141,"sku":"558-502","price":999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/fc5a03647180e96a5a44ccbdc7d1619b733233ac.jpg?v=1753422125"},{"product_id":"gm-tpi-and-stealth-ram-efi-harness-kit-558-503","title":"GM TPI and Stealth Ram EFI Harness Kit","description":"\u003cp\u003eAn EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system!\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFull harness kit\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eWorks with Dominator and HP ECU's\u003c\/li\u003e\n\u003cli\u003eIncludes Stealthram\/TPI Main Harness, Main Power Harness, V8 Injector Harness, HEI Ignition Harness, Ignition Adapter, and Tach Input\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e GM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e CD Ignition (No Timing Control)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjector Connector:\u003c\/strong\u003e Jetronic \/ Minitimer (Bosch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase a ECU and O2 Sensor to make this a complete kit.\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/efi_selection_chart62914.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFI selection chart\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/032b3bf88c32bc73b04fa087810c66244262203d.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10837.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/0b8eaa8389d9d1b734a4a0d96bfbaddb00469e16.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - techlibrary_199r10555rev16.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246812430429,"sku":"558-503","price":899.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/f9673726c94440e6b1ac39a58e5b4c8b65fe69b7.jpg?v=1753422121"},{"product_id":"holley-efi-gm-drive-by-wire-harness-early-truck-558-429","title":"Holley EFI GM Drive-By-Wire Harness - Early Truck","description":"\u003cp\u003eTerminator X Max and Dominator EFI GM DBW Harness-Early Truck. Compatible with GM part number 10379038.\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e GM, LSX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Drive-By-Wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drive By Wire Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/8d136887dde82044f2878786ecc443b1519a5bee.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 558-429_gm_truck_dbw_harness_diagram.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/f22f88433a1e50b2d920b9079530c7eab0081593.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10810.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246853914717,"sku":"558-429","price":285.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/08f5cf1cf33c751e824e51028e3370d2b8b5689a.jpg?v=1753421670"},{"product_id":"holley-efi-pro-dash-standalone-service-harness-558-457","title":"Holley EFI Pro Dash Standalone Service Harness","description":"\u003cp\u003eHolley EFI Pro Dash replacement harness for standalone digital dashes.\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement\u003c\/li\u003e\n\u003cli\u003ePlug and Play\u003c\/li\u003e\n\u003cli\u003eNew connectors\u003c\/li\u003e\n\u003cli\u003eUnterminated sensor leads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Electrical, Lighting and Body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Color:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Display Wiring Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Or Specific Fit:\u003c\/strong\u003e Universal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eFor standalone dashes\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/56876c9c083e4139f3c84656b06098de804e54bb.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - Pro Dash Wiring and Sensor Setup and Instruction Guide - 5.29.20.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246858731613,"sku":"558-457","price":371.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/Holley_EFI_Pro_Dash_Standalone_Service_Harness.jpg?v=1753421579"},{"product_id":"holley-efi-terminator-x-dbw-harness-gm-gen-v-ltx-558-468","title":"Holley EFI Terminator X DBW Harness - GM GEN V LTX","description":"\u003cp\u003eGM GEN V LTx DBW Harness. Compatible with GM part number  12617792 (L83), and 12678223 (L86, LT1, LT4).\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Electrical, Lighting and Body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e GM, LT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Drive-By-Wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Throttle Body Wiring Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drive By Wire Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246866071645,"sku":"558-468","price":299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/469bb7abee1ec2676eec464bc09a7639ba423a28.jpg?v=1753421526"},{"product_id":"hp-smart-coil-ignition-harness-558-312","title":"HP Smart Coil Ignition Harness","description":"\u003cp\u003eHP Smart Coil ignition sub-harness. Includes a pair of coil harnesses for an 8 cylinder engine. These harnesses are similar in design to factory GM LSx coil harnesses, but plug into Holley HP Smart Coils. They plug into Holley LSx plug and play main harnesses if one wants to replace factory LSx coils with Holley HP Smart Coils. If using a non-LSx main harness, purchase PN 558-307 for connectors, wiring, terminals to connect directly to a Holley HP or Dominator ECU\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIncludes a pair of coil harnesses for an 8 cylinder engine\u003c\/li\u003e\n\u003cli\u003eSimilar to factory GM LSx coil harnesses\u003c\/li\u003e\n\u003cli\u003eFor use with Holley HP or Dominator ECUs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Universal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Ignition Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Distrutorless Ignition - DIS - smart coil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Ignition Wire and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/1d29bb7a66152560cc97539a0af15cb809508d64.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10698rev1.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246938783837,"sku":"558-312","price":299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/a9990287af544c37992ed0ff20056839f28ea948_e4728379-f42b-48dd-b70a-58c5a02ae1ce.jpg?v=1753420838"},{"product_id":"injector-harness-early-truck-558-214","title":"INJECTOR HARNESS - EARLY TRUCK","description":"\u003cp\u003eMULTEC 2 INJECTOR HARNESS - EARLY TRUCK\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Universal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Type:\u003c\/strong\u003e Injector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e LS Multec Style Injector Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246940455005,"sku":"558-214","price":291.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/d24340c343b705bdb62004e26fd0792c4c8a9135.jpg?v=1753420820"},{"product_id":"main-engine-harness-for-24x-ls-w-tbi-558-111","title":"Main Engine Harness for 24x LS w\/TBI","description":"\u003cp\u003eMain 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 engine. This harness has crank and cam sensor plugs for Gen 3 24X LS engines as well as Odd\/Even LS coil harness plugs and a bulkhead connector for the 534-227, 534-225 and similar throttle body injection units.\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Terminator LS Main Engine Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eOnly compatible with Terminator TBI throttle bodies, NOT for Multi-Port Fuel Injection\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/bd7d5ae49c66e7f2693b381a86a4684d530cdaf3.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 558-111_terminator_efi_24x_ls_main_harness_diagram.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246946648157,"sku":"558-111","price":749.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/730c2255b2ee5c681ba352783d01e8f87f1000fc.jpg?v=1753420766"},{"product_id":"main-engine-harness-for-58x-ls-w-tbi-558-112","title":"MAIN ENGINE HARNESS FOR 58X LS W\/TBI","description":"\u003cp\u003eMain 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 engine. This harness has crank and cam sensor plugs for Gen 4 58x LS engines as well as Odd\/Even LS coil harness plugs and a bulkhead connector for the 534-227, 534-225 and similar throttle body injection units.\u003c\/p\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Terminator LS Main Engine Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/535adeb86d026068512e7035d32bb073215e641c.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 558-112__terminator_efi_58x_ls_main_harness_diagram.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246946680925,"sku":"558-112","price":727.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/149bca87031c6ee7fb1deb4c045bf7c86b4367f1.jpg?v=1753420765"},{"product_id":"universal-ford-v-8-harness-kit-558-508","title":"Universal Ford V-8 Harness Kit","description":"\u003cp\u003eUniversal Ford V8 Harness Kit for Holley HP and Dominator ECU's\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHarness Kit Includes: Main Power Harness, Universal MPFI Main Harness, Ford V-8 Injector Harness, Ignition Adapter \u0026amp; Tach Input\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eCan be used with HP or Dominator ECU's\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjector Connector:\u003c\/strong\u003e Jetronic \/ Minitimer (Bosch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit.\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/efi_selection_chart62914.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFI selection chart\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/032b3bf88c32bc73b04fa087810c66244262203d.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10837.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246963425373,"sku":"558-508","price":469.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/9953524eb7db9eb57426efcfbc162ef19278c0d3.jpg?v=1753420616"},{"product_id":"universal-v8-mpfi-efi-harness-kit-558-504","title":"Universal V8 MPFI EFI HARNESS KIT","description":"\u003cp\u003eAn EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system!\u003c\/p\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHarness Kit Includes; Main Power Harness, Universal MPFI Main Harness, v-8 Injector Harness\u003c\/li\u003e\n\u003cli\u003eSimple installation\u003c\/li\u003e\n\u003cli\u003eWorks with HP or Dominator ECU's\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecs:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Holley EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Air and Fuel Delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Code:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Application:\u003c\/strong\u003e Ford, GM, Universal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e CD Ignition (No Timing Control)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjector Connector:\u003c\/strong\u003e Jetronic \/ Minitimer (Bosch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Harness Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSub Category:\u003c\/strong\u003e Wire, Cable and Related Components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTech Resources:\u003c\/h3\u003e\u003cp\u003eNOTICE: You will need to purchase an ECU and O2 Sensor to make this a complete kit.\n\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/efi_selection_chart62914.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEFI selection chart\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/032b3bf88c32bc73b04fa087810c66244262203d.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - 199r10837.pdf\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/\/documents.holley.com\/0b8eaa8389d9d1b734a4a0d96bfbaddb00469e16.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstructions - techlibrary_199r10555rev16.pdf\u003c\/a\u003e\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":43246964342877,"sku":"558-504","price":899.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1618\/5607\/files\/3c308370123e29111cabc7a21f31ce52b152d644.jpg?v=1753420605"}],"url":"https:\/\/jsspeedshop.ca\/collections\/diesel-wiring-harnesses.oembed?page=2","provider":"JS Speedshop","version":"1.0","type":"link"}