{"product_id":"holley-efi-terminator-x-handheld-controller","title":"Holley EFI Terminator X 3.5\" LCD Touchscreen Handheld Controller","description":"\u003cp\u003eThe \u003cstrong\u003eHolley EFI Terminator X 3.5\" LCD Touchscreen Handheld Controller\u003c\/strong\u003e gives you complete control of your Terminator X EFI system without requiring a laptop. Featuring a full-color backlit touchscreen, this handheld allows you to perform tuning adjustments, monitor engine vitals, configure ECU settings, record datalogs, update firmware, and review system diagnostics—all from an intuitive interface.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're performing an initial startup, making track-side tuning changes, or simply monitoring engine performance, the Terminator X handheld provides quick access to fuel, ignition, idle, and closed-loop tuning parameters. The customizable gauge layouts make it easy to keep an eye on critical engine data while the built-in SD card support allows datalogging and firmware updates in minutes.\u003c\/p\u003e\n\n\u003ch4\u003eIncludes:\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e(1) Holley EFI 3.5\" LCD Touchscreen Handheld Controller\u003c\/li\u003e\n\u003cli\u003eMounting Sleeve\u003c\/li\u003e\n\u003cli\u003ePower Harness\u003c\/li\u003e\n\u003cli\u003eExtension Harness\u003c\/li\u003e\n\u003cli\u003eSD Card\u003c\/li\u003e\n\u003cli\u003eUser Manual CD\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\n\u003cdiv class=\"details-content rte\"\u003e\n\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eHolley EFI\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e553-201\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eDisplay Size\u003c\/td\u003e\n\u003ctd\u003e3.5 in. Full-Color Backlit LCD Touchscreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHandheld EFI Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eTuning Capability\u003c\/td\u003e\n\u003ctd\u003eFuel, Spark, Idle, Closed Loop, Learn, IAC, Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eData Logging\u003c\/td\u003e\n\u003ctd\u003eInternal ECU Datalogging with SD Card Support\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eFirmware Updates\u003c\/td\u003e\n\u003ctd\u003eSupported via SD Card\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eScreen Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.35\" W × 2.85\" H × 0.70\" Thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eMount Sleeve Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.625\" W × 2.925\" H × 1.00\" Thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003chr\u003e\n\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\n\u003cdiv class=\"details-content rte\"\u003e\n\n\u003cul\u003e\n\u003cli\u003eCompatible only with Holley Terminator X EFI systems.\u003c\/li\u003e\n\u003cli\u003eWorks with Terminator X and Terminator X Max ECUs.\u003c\/li\u003e\n\u003cli\u003eIdeal as a replacement handheld or additional controller.\u003c\/li\u003e\n\u003cli\u003eAllows laptop-free tuning, monitoring, and diagnostics.\u003c\/li\u003e\n\u003cli\u003eLegal for use on emissions-controlled vehicles, non-emissions-controlled vehicles, and racing-only vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003chr\u003e\n\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eTech Insight\u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\n\u003cdiv class=\"details-content rte\"\u003e\n\n\u003ch3\u003e1. What can I tune with the handheld?\u003c\/h3\u003e\n\n\u003cp\u003eThe handheld provides access to basic and advanced tuning functions including fuel, ignition timing, idle speed, closed-loop fuel control, fuel learning, IAC settings, rev limiters, engine setup, ignition setup, and programmable outputs.\u003c\/p\u003e\n\n\u003ch3\u003e2. Can I tune without a laptop?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The handheld was designed specifically for laptop-free tuning, allowing you to make adjustments directly from the touchscreen.\u003c\/p\u003e\n\n\u003ch3\u003e3. Can it display live engine data?\u003c\/h3\u003e\n\n\u003cp\u003eAbsolutely. The display features multiple preconfigured gauge layouts and customizable monitoring screens so you can watch critical engine parameters in real time.\u003c\/p\u003e\n\n\u003ch3\u003e4. Does it support data logging?\u003c\/h3\u003e\n\n\u003cp\u003eYes. The handheld can configure ECU datalogging, save logs to the included SD card, transfer calibration files, and perform ECU firmware updates.\u003c\/p\u003e\n\n\u003ch3\u003e5. Is this compatible with Sniper or HP EFI?\u003c\/h3\u003e\n\n\u003cp\u003eNo. This handheld is designed exclusively for Holley Terminator X EFI systems and is not compatible with Sniper EFI, HP EFI, or Dominator EFI systems.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003chr\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":56904474329254,"sku":"553-201","price":374.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/553-201-Holley-Terminator-X-Handheld-Controller-1.jpg?v=1785852785","url":"https:\/\/wideopendesign.com\/products\/holley-efi-terminator-x-handheld-controller","provider":"Wide Open Design","version":"1.0","type":"link"}