{"product_id":"holley-efi-terminator-x-max-service-ecu-replacement-controller","title":"Holley EFI Terminator X Max Service ECU – Replacement Controller","description":"\u003cp\u003eThe \u003cstrong\u003eHolley EFI Terminator X Max Service ECU – Replacement Controller\u003c\/strong\u003e is designed as a standalone service component for existing Terminator X and Terminator X Max installations. This replacement ECU provides real-time fuel learning, high-impedance injector control, Bosch LSU 4.9 wideband support, electronic transmission control, drive-by-wire throttle control, and advanced programmable engine-management functions.\u003c\/p\u003e\n\u003cp\u003eThe Terminator X Max ECU includes an integrated 1-bar MAP sensor, four programmable inputs, four programmable outputs, eight multi-color diagnostic LEDs, CAN-BUS support, data logging, boost control, progressive nitrous control, and advanced custom tables. It is compatible with all Terminator X harnesses, but the available functions still depend on the engine harness, transmission harness, throttle-body configuration, sensors, and calibration used in the installation.\u003c\/p\u003e\n\u003ch4\u003eIncludes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Holley EFI Terminator X Max Service ECU\u003c\/li\u003e\n\u003cli\u003eIntegrated 1-Bar MAP Sensor\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 Wideband Controller\u003c\/li\u003e\n\u003cli\u003eEight Built-In Multi-Color Diagnostic LEDs\u003c\/li\u003e\n\u003cli\u003eHarnesses, Sensors, Wideband Oxygen Sensor, and Mounting Hardware Sold Separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eHolley EFI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e554-153\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eTerminator X Max Service ECU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Type\u003c\/td\u003e\n\u003ctd\u003eEngine Control Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHarness Compatibility\u003c\/td\u003e\n\u003ctd\u003eAll Terminator X Harnesses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector Support\u003c\/td\u003e\n\u003ctd\u003eHigh-Impedance OEM and Performance Injectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWideband Control\u003c\/td\u003e\n\u003ctd\u003eGenuine Bosch LSU 4.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLSU 4.2 Compatibility\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal MAP Sensor\u003c\/td\u003e\n\u003ctd\u003e1 Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgrammable Inputs\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgrammable Outputs\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive-By-Wire Control\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Control\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic LEDs\u003c\/td\u003e\n\u003ctd\u003e8 Multi-Color LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoost Control\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgressive Nitrous Control\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMulti-Stage Nitrous Control\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAN-BUS Support\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Logging\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eE85 Support\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEGT Support\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTraction Control Support\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoil-Per-Cylinder Ignition Support\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Gender\u003c\/td\u003e\n\u003ctd\u003eMale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Quantity\u003c\/td\u003e\n\u003ctd\u003e114\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hole Quantity\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e9.60\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e5.00\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e1.63\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.44 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHolley Terminator X Harnesses\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHolley Terminator X Max Harnesses\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive-By-Wire Engine Families\u003c\/td\u003e\n\u003ctd\u003eGM LS and LT, Ford Coyote, and Mopar Gen V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGM Transmission Control\u003c\/td\u003e\n\u003ctd\u003e4L60 and 4L80 Families\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFord Transmission Control\u003c\/td\u003e\n\u003ctd\u003e4R70W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWideband Oxygen Sensor\u003c\/td\u003e\n\u003ctd\u003eBosch LSU 4.9 Only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Use\u003c\/td\u003e\n\u003ctd\u003eRacing Use Only Vehicles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarine Applications\u003c\/td\u003e\n\u003ctd\u003eNot Recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned as a service replacement ECU for compatible Terminator X and Terminator X Max installations.\u003c\/li\u003e\n\u003cli\u003eCompatible with all Terminator X harnesses, but available functions depend on the harnesses and components installed.\u003c\/li\u003e\n\u003cli\u003eDrive-by-wire control supports compatible GM LS and LT, Ford Coyote, and Mopar Gen V throttle-body systems.\u003c\/li\u003e\n\u003cli\u003eTransmission control supports compatible GM 4L60 and 4L80 families and Ford 4R70W applications.\u003c\/li\u003e\n\u003cli\u003eRequires a genuine Bosch LSU 4.9 wideband oxygen sensor and will not operate with an LSU 4.2 sensor.\u003c\/li\u003e\n\u003cli\u003eThe internal 1-bar MAP sensor can be disabled when using a compatible external MAP sensor on boosted applications.\u003c\/li\u003e\n\u003cli\u003eHarnesses, sensors, throttle pedal, throttle body, transmission harness, wideband sensor, and mounting hardware are not included.\u003c\/li\u003e\n\u003cli\u003eVerify engine harness, crank and cam configuration, injector type, throttle-body compatibility, transmission type, and ECU calibration before ordering.\u003c\/li\u003e\n\u003cli\u003eLegal for sale or use only on vehicles used exclusively for competition that are not registered and may never be used on public roads.\u003c\/li\u003e\n\u003cli\u003eNot recommended for marine applications.\u003c\/li\u003e\n\u003cli\u003eFor off-road use, mount the ECU in a dry location protected from heat, impact, and excessive vibration, with proper wiring support and strain relief.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\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\u003cdiv class=\"details-content rte\"\u003e\n\u003ch3\u003e1. Is this a complete Terminator X Max system?\u003c\/h3\u003e\n\u003cp\u003eNo. This is a service replacement ECU intended for an existing Terminator X or Terminator X Max installation. Engine harnesses, transmission harnesses, sensors, wideband oxygen sensor, main power wiring, throttle components, and other system parts are sold separately.\u003c\/p\u003e\n\u003ch3\u003e2. What is the difference between the Terminator X and Terminator X Max ECU?\u003c\/h3\u003e\n\u003cp\u003eThe Terminator X Max adds electronic transmission control and drive-by-wire throttle-body control. The usable functions depend on the correct engine, throttle, transmission, and input\/output harnesses being installed and properly configured.\u003c\/p\u003e\n\u003ch3\u003e3. Can this ECU control a boosted or nitrous engine?\u003c\/h3\u003e\n\u003cp\u003eYes. It supports boost versus time, gear, RPM, and speed strategies, along with boost safeties. It also supports a single wet or dry nitrous channel with progressive or non-progressive control, rich and lean safeties, and closed-loop air-fuel targeting.\u003c\/p\u003e\n\u003ch3\u003e4. What can the programmable inputs and outputs control?\u003c\/h3\u003e\n\u003cp\u003eThe four inputs can accept 12-volt, ground, 5-volt, or frequency-based signals from pressure sensors, switches, nitrous triggers, trans brakes, and other devices. The four ground or PWM outputs can operate relays, fans, boost solenoids, nitrous controls, compatible IAC hardware, and other accessories.\u003c\/p\u003e\n\u003ch3\u003e5. What should be checked before replacing an existing ECU?\u003c\/h3\u003e\n\u003cp\u003eConfirm the original ECU type, harness compatibility, engine configuration, injector impedance, wideband sensor type, drive-by-wire components, transmission type, firmware, calibration file, and power and ground integrity. A wiring or sensor fault should be corrected before installing the replacement ECU.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":56901504532646,"sku":"554-153","price":1299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/554-153-Holley-EFI-Terminator-X-Max-Service-ECU-1.jpg?v=1785790594","url":"https:\/\/wideopendesign.com\/products\/holley-efi-terminator-x-max-service-ecu-replacement-controller","provider":"Wide Open Design","version":"1.0","type":"link"}