{"title":"Engine Control Module (ECM) Wiring Harness","description":null,"products":[{"product_id":"terminator-efi-input-output-kit","title":"Terminator EFI Input\/Output Kit","description":"PN 558-420 contains 5 extra input\/output wires that the base Terminator EFI harness does not contain. It contains Input wires for Inputs 1-4. It contains one wire for Output 2. These inputs and outputs can perform features and functions that must be programmed via Holley EFI laptop software. The software also contains instructions on how to program these.","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":44152207573107,"sku":"GVMR_558-420","price":52.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/558-420_01.jpg?v=1765771920"},{"product_id":"terminator-main-harness","title":"Terminator Main Harness","description":"Replacement main harness for Terminator EFI installations using 4 barrel throttle body fuel injection systems. This product was designed to be used specifically on Holley P\/N's 550-405 and 550-406.","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":44152209932403,"sku":"GVMR_558-414","price":499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/558-414_01.jpg?v=1765771960"},{"product_id":"main-battery-harness-with-fuse-and-fuel-pump-relay","title":"Main Battery Harness with Fuse and Fuel Pump Relay","description":"This harness includes switched 12V power, battery positive and negative, fuel pump relay, coil input, and magnetic distributor input wires. Six feet of 3\/8\" black braided split wire loom has also been included to keep the wires protected and cleaner installation.","brand":"Holley Sniper EFI","offers":[{"title":"Default Title","offer_id":44315246035059,"sku":"FRCQ_558-490","price":168.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/558-490_01.jpg?v=1771363386"},{"product_id":"harness-with-fuse-and-fuel-pump-relay-for-sniper-2-throttle-body-systems","title":"Harness with Fuse and Fuel Pump Relay for Sniper 2 Throttle Body Systems","description":"This harness includes a switched 12V, battery+ and ground-, fuel pump relay, coil input wire, and HyperSpark distributor connector. The wiring is braided split loom to keep the wires protected in the engine bay. This is intended to be used on applications wanting a fuel pump relay.","brand":"Holley Sniper EFI","offers":[{"title":"Default Title","offer_id":44315340898419,"sku":"FRCQ_558-191","price":212.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/2dd1aa71f26d12ec60c47037197c3b9d0138ab01.jpg?v=1771366870"},{"product_id":"eliminates-the-need-to-rewire-your-existing-sniper-efi-installation","title":"Eliminates the need to rewire your existing Sniper EFI installation","description":"Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? This harness is designed to do exactly that! The Sniper adapter harness is a plug-and-play solution to connect your existing Sniper 1 wiring harness to a Sniper 2 throttle body. This can be used with any Sniper 2 system that is not equipped with a power distribution module (PDM). Remove your Sniper EFI throttle body from the intake manifold, unplug all of the connectors, and plug the Sniper EFI 2 adapter harness into your existing main harness. Cycle your ignition key, run a fresh wizard on the display of your choosing, and enjoy the benefits of Sniper EFI 2. Sniper EFI 2 is a high-performance electronic fuel injection system designed for a wide range of engines and horsepower goals. It provides improved engine performance, better fuel efficiency, and easier starting, making it the perfect upgrade for any enthusiast looking to take their ride to the next level. With its easy installation and advanced technology, the Sniper EFI 2 is the ultimate fuel injection system for any conventional V8 engine.","brand":"Holley Sniper EFI","offers":[{"title":"Default Title","offer_id":44315341881459,"sku":"FRCQ_558-489","price":56.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/71926d68a90f28e7ed91cb7ad53a20443b207d7f.jpg?v=1771366889"},{"product_id":"holley-efi-main-power-harness-for-coyote-ti-vct-applications","title":"Holley EFI Main Power Harness for Coyote Ti-VCT Applications","description":"Introducing Coyote Twin Independent Variable Cam Timing Control from Holley EFI. Unlock the full potential of your high revving power plant with the Holley EFI Plug and Play Coyote Ti-VCT Control Module.","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":44315406565491,"sku":"GVMR_558-319","price":61.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/558-319_011812.jpg?v=1771368728"},{"product_id":"holley-efi-gen-v-lt-engine-main-harness","title":"Holley EFI Gen V LT Engine Main Harness","description":"This harness is designed for use with Terminator X and X Max ECU's Only.","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":44315468267635,"sku":"GVMR_558-129","price":574.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/d7a539e5d995f82b6ca6868d23711d920e0099e4.png?v=1771369411"},{"product_id":"for-use-with-terminator-x-requires-v3-software","title":"For use with Terminator X - Requires V3 Software","description":"This harness is designed for use with Terminator X ECU's Only with V3 build 100 or later.","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":44315469381747,"sku":"GVMR_558-130","price":574.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/1969\/6499\/files\/182920747b01178210b2129ecbb87e15a9fa7498.png?v=1771369414"}],"url":"https:\/\/oneshotpowersports.com\/collections\/engine-control-module-ecm-wiring-harness.oembed","provider":"One Shot Powersports","version":"1.0","type":"link"}