{"title":"ECU Extension Harnesses for Holley EFI","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ctable style=\"width: 100.087%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 65.9071%;\"\u003e \n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg height=\"195\" width=\"299\" style=\"margin-bottom: 16px; float: left;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/files\/Holley_EFI_Logo_ffdc38ac-7902-4a68-8796-1c9c520fe551_480x480.png?v=1727451475\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 33.83%; text-align: center;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eOur Holley EFI ECU Extension Harnesses are made by EFI Conversions with the same quality crimped connections and connectors Holley EFI uses. We are the premier online store for extensions, allowing you to choose the length you need to custom order your extensions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eSee also our list of \u003ca href=\"https:\/\/eficonversions.com\/collections\/pigtails\/HOLLEY-EFI\"\u003eCustom-Length Pigtails for Holley EFI\u003c\/a\u003e\n\u003c\/h3\u003e","products":[{"product_id":"holley-dominator-ecu-34-pin-j1a-p1a-extension-harness","title":"J1A P1A 34-pin Extension Harness for Holley EFI Dominator ECU","description":"\u003cp\u003eThis J1A P1A 34-pin Extension Harness for Holley EFI Dominator ECU is a build-to-length Holley EFI Extension Harness \u003cmeta charset=\"utf-8\"\u003eand is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47111799374118,"sku":"AWP-3020-12","price":77.7,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095300092198,"sku":"AWP-3020-24","price":89.4,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095300124966,"sku":"AWP-3020-36","price":102.5,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095300157734,"sku":"AWP-3020-48","price":117.1,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095300190502,"sku":"AWP-3020-60","price":133.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3020.png?v=1749212813"},{"product_id":"holley-dominator-ecu-26-pin-j1b-p1b-extension-harness","title":"J1B P1B 26-pin Extension Harness for Holley EFI Dominator ECU","description":"\u003cp\u003eThis J1B P1B 26-pin Extension Harness for Holley EFI Dominator ECU is a build-to-length Holley EFI Extension Harness \u003cmeta charset=\"utf-8\"\u003eand is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47129207570726,"sku":"AWP-3021-12","price":75.5,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095299862822,"sku":"AWP-3021-24","price":84.0,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095299895590,"sku":"AWP-3021-36","price":93.3,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095299928358,"sku":"AWP-3021-48","price":103.6,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095299961126,"sku":"AWP-3021-60","price":115.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3021.png?v=1749212813"},{"product_id":"holley-dominator-ecu-34-pin-j2a-p2a-extension-harness","title":"J2A P2A 34-pin Extension Harness for Holley EFI Dominator ECU","description":"\u003cp\u003eThis J2A P2A 34-pin Extension Harness for Holley EFI Dominator ECU is a build-to-length Holley EFI Extension Harness \u003cmeta charset=\"utf-8\"\u003eand is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47129300435238,"sku":"AWP-3022-12","price":77.8,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095299698982,"sku":"AWP-3022-24","price":87.1,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095299731750,"sku":"AWP-3022-36","price":97.5,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095299764518,"sku":"AWP-3022-48","price":108.9,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095299797286,"sku":"AWP-3022-60","price":121.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3022.png?v=1749212812"},{"product_id":"holley-dominator-ecu-26-pin-j2b-p2b-extension-harness","title":"J2B P2B 26-pin Extension Harness for Holley EFI Dominator ECU","description":"\u003cp\u003eThis J2B P2B 26-pin Extension Harness for Holley EFI Dominator ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47129301025062,"sku":"AWP-3023-12","price":75.6,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095299371302,"sku":"AWP-3023-24","price":84.1,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095299404070,"sku":"AWP-3023-36","price":93.4,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095299436838,"sku":"AWP-3023-48","price":103.7,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095299469606,"sku":"AWP-3023-60","price":115.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3023.png?v=1749212811"},{"product_id":"holley-dominator-ecu-26-pin-j3-p3-drive-by-wire-extension-harness","title":"J3 P3 26-pin Drive by Wire Extension Harness for Holley EFI Dominator ECU","description":"\u003cp\u003eThis J3 P3 26-pin Drive by Wire Extension Harness for Holley EFI Dominator ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47129487048998,"sku":"AWP-3024-12","price":75.4,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095299043622,"sku":"AWP-3024-24","price":83.9,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095299076390,"sku":"AWP-3024-36","price":93.2,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095299109158,"sku":"AWP-3024-48","price":103.5,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095299141926,"sku":"AWP-3024-60","price":114.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3024.png?v=1749212810"},{"product_id":"holley-dominator-ecu-26-pin-j4-p4-4l60e-4l80e-transmission-extension-harness","title":"J4 P4 26-pin 4L60e 4L80e Transmission Extension Harness for Holley EFI Dominator ECU","description":"\u003cp\u003eThis J4 P4 26-pin 4L60e 4L80e Transmission Extension Harness for Holley EFI Dominator ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47129487868198,"sku":"AWP-3025-12","price":75.6,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095298781478,"sku":"AWP-3025-24","price":84.1,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095298814246,"sku":"AWP-3025-36","price":93.4,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095298847014,"sku":"AWP-3025-48","price":103.7,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095298879782,"sku":"AWP-3025-60","price":115.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3025.png?v=1749212810"},{"product_id":"holley-hp-ecu-34-pin-j1a-p1a-extension-harness","title":"J1A P1A 34-pin Extension Harness for Holley EFI HP ECU","description":"\u003cp\u003eThis J1A P1A 34-pin Extension Harness for Holley EFI HP ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47130542702886,"sku":"AWP-3026-12","price":77.7,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095298453798,"sku":"AWP-3026-24","price":89.4,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095298486566,"sku":"AWP-3026-36","price":102.5,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095298519334,"sku":"AWP-3026-48","price":117.1,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095298552102,"sku":"AWP-3026-60","price":133.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3026.png?v=1749212809"},{"product_id":"holley-hp-ecu-26-pin-j1b-p1b-extension-harness","title":"J1B P1B 26-pin Extension Harness for Holley EFI HP ECU","description":"\u003cp\u003eThis J1B P1B 26-pin Extension Harness for Holley EFI HP ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47130543096102,"sku":"AWP-3027-12","price":75.5,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095298191654,"sku":"AWP-3027-24","price":84.0,"currency_code":"USD","in_stock":true},{"title":"36 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P1B 26-pin Extension Harness for Holley EFI Terminator X ECU is a build-to-length Holley EFI Extension Harness and is perfect to extend any of the included Holley ECU harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47130543784230,"sku":"AWP-3029-12","price":74.99,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095297667366,"sku":"AWP-3029-24","price":83.99,"currency_code":"USD","in_stock":true},{"title":"28 inches","offer_id":49763505045798,"sku":"AWP-3029-28","price":94.99,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095297700134,"sku":"AWP-3029-36","price":99.99,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095297732902,"sku":"AWP-3029-48","price":104.99,"currency_code":"USD","in_stock":true},{"title":"60 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ECU engine harnesses to reach the distance you need.\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":47130698547494,"sku":"AWP-3034-12","price":75.6,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":48095296225574,"sku":"AWP-3034-24","price":84.1,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":48095296258342,"sku":"AWP-3034-36","price":93.4,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":48095296291110,"sku":"AWP-3034-48","price":103.7,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":48095296356646,"sku":"AWP-3034-60","price":115.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/products\/AWP-3034.png?v=1749212803"},{"product_id":"ti-vct-cam-controller-554-145-extension-harness-for-holley-efi","title":"Ti-VCT Cam Controller 554-145 Extension Harness for Holley 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These harnesses are built using \u003cspan style=\"text-decoration: underline;\"\u003e10 AWG TXL wire,\u003c\/span\u003e the largest wire size for the Aptiv Ducon 6.3 terminals required. Extend the Holley EFI ECU power connection at your own risk.\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Automotive Wiring Products","offers":[{"title":"12 inches","offer_id":52078850965798,"sku":"AWP-3065-12","price":71.8,"currency_code":"USD","in_stock":true},{"title":"24 inches","offer_id":52078850998566,"sku":"AWP-3065-24","price":79.9,"currency_code":"USD","in_stock":true},{"title":"36 inches","offer_id":52078851031334,"sku":"AWP-3065-36","price":88.8,"currency_code":"USD","in_stock":true},{"title":"48 inches","offer_id":52078851064102,"sku":"AWP-3065-48","price":98.6,"currency_code":"USD","in_stock":true},{"title":"60 inches","offer_id":52078851096870,"sku":"AWP-3065-60","price":109.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/files\/AWP-3065_7c21e803-2108-489e-8113-0968c71a8af0.png?v=1770759842"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0057\/1549\/2910\/collections\/Holley_EFI_Logo_ffdc38ac-7902-4a68-8796-1c9c520fe551.png?v=1782220370","url":"https:\/\/eficonversions.com\/collections\/ecu-extension-harnesses-for-holley-efi.oembed?page=3","provider":"EFI Conversions","version":"1.0","type":"link"}