{"product_id":"holley-terminator-x-max-gen-iv-truck-ls2-ls3-550-931","title":"Holley Terminator X Max, GM Gen IV 4.8\/5.3\/6.0 Truck \u0026 LS2\/LS3, DBW, EV6 | 550-931","description":"\u003cp\u003eTerminator X Max brings complete standalone engine control to Gen IV GM 4.8\/5.3\/6.0 truck engines and LS2\/LS3, with drive-by-wire throttle body control built in. It replaces a junkyard ECU with real-time fuel learn and Holley EFI's race-proven tuning technology, and includes a 3.5 in. touchscreen handheld for calibration and gauge display right out of the box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDesigned for GM 4.8\/5.3\/6.0 LS truck engines and LS2\/LS3 with 58x crank, 4x cam, EV6 injectors, and drive-by-wire throttle body control\u003c\/li\u003e\n\u003cli\u003eReal-time fuel map learn removes the guesswork from tuning the base fuel table\u003c\/li\u003e\n\u003cli\u003eHigh-impedance injector drivers safely power most stock LS and Holley EFI injectors\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband oxygen sensor included for accurate AFR feedback\u003c\/li\u003e\n\u003cli\u003eOn-board 1-bar MAP sensor (GM 12592525 sensor plus 558-416 adapter recommended for 2+ bar boosted applications)\u003c\/li\u003e\n\u003cli\u003e4 programmable inputs and 4 programmable outputs for fans, boost\/nitrous control, IAC, and more\u003c\/li\u003e\n\u003cli\u003eBoost control strategies: vs. time, vs. gear, vs. RPM, vs. speed, plus boost safeties\u003c\/li\u003e\n\u003cli\u003eSingle-channel wet or dry progressive nitrous control with rich\/lean safeties\u003c\/li\u003e\n\u003cli\u003eAdvanced tables: 4x 1D, 1x 1D per gear, 4x 2D, 1x 2D per gear for custom tuning needs\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs for ECU power, engine run, wideband status, TPS\/crank\/cam signal\u003c\/li\u003e\n\u003cli\u003eIncludes 3.5 in. touchscreen handheld with calibration wizard, internal data logging, and customizable gauge display\u003c\/li\u003e\n\u003cli\u003eCompact ECU mounts virtually anywhere (LEDs must face up)\u003c\/li\u003e\n\u003cli\u003ePlug-and-play compatible with Holley EFI gauges, shift lights, and dash accessories (P\/N 553-106, 553-111, 553-112)\u003c\/li\u003e\n\u003cli\u003eFree EFI tuning software for full laptop control\u003c\/li\u003e\n\u003cli\u003eRecommended drive-by-wire pedal: P\/N 10379038\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEngine: Gen IV GM LS Truck \/ LS2\/LS3\u003c\/li\u003e\n\u003cli\u003eCrank Reluctor: 58x, Cam Signal: 4x\u003c\/li\u003e\n\u003cli\u003eInjector Connector: USCAR (EV6)\u003c\/li\u003e\n\u003cli\u003eDrive-By-Wire: Yes | Transmission Control: None\u003c\/li\u003e\n\u003cli\u003eMAP Sensor: 1-bar, integrated\u003c\/li\u003e\n\u003cli\u003eHandheld Included: Yes, 3.5 in. touchscreen\u003c\/li\u003e\n\u003cli\u003eIncludes: 58x\/4x LS Engine Main Harness, EV6 Injector Harness, DBW Throttle Body Harness, Terminator X Max ECU, ECU Main Power Harness, Bosch LSU 4.9 Wideband O2 Sensor, I\/O Harness, vacuum adapters\u003c\/li\u003e\n\u003cli\u003ePart Number: 550-931\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDesigned to work with GM throttle body P\/N 12570790 or 12580760, and GM throttle pedal P\/N 10379038. Terminator X ECUs are designed to be mounted with the LEDs facing up.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eWhat engines is the 550-931 Terminator X Max system designed for?\u003c\/h5\u003e\u003cp\u003eIt's built for GM Gen IV LS truck engines (4.8\/5.3\/6.0) and LS2\/LS3 engines with a 58x crank, 4x cam, and drive-by-wire throttle body control.\u003c\/p\u003e\u003ch5\u003eDoes this kit include a handheld for tuning?\u003c\/h5\u003e\u003cp\u003eYes, it includes a 3.5 in. touchscreen handheld with a calibration wizard, data logging, and a customizable gauge display.\u003c\/p\u003e\u003ch5\u003eWhich throttle body does this system support?\u003c\/h5\u003e\u003cp\u003eIt's designed to work with GM throttle body part numbers 12570790 and 12580760.\u003c\/p\u003e\u003ch5\u003eCan this system run boosted applications above 1 bar?\u003c\/h5\u003e\u003cp\u003eFor boosted combinations requiring 2+ bar, Holley recommends the GM 12592525 MAP sensor with the 558-416 adapter harness.\u003c\/p\u003e\u003ch5\u003eHow should the ECU be mounted?\u003c\/h5\u003e\u003cp\u003eThe Terminator X Max ECU should be mounted with its diagnostic LEDs facing up.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What engines is the 550-931 Terminator X Max system designed for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It's built for GM Gen IV LS truck engines (4.8\/5.3\/6.0) and LS2\/LS3 engines with a 58x crank, 4x cam, and drive-by-wire throttle body control.\"}},{\"@type\":\"Question\",\"name\":\"Does this kit include a handheld for tuning?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, it includes a 3.5 in. touchscreen handheld with a calibration wizard, data logging, and a customizable gauge display.\"}},{\"@type\":\"Question\",\"name\":\"Which throttle body does this system support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It's designed to work with GM throttle body part numbers 12570790 and 12580760.\"}},{\"@type\":\"Question\",\"name\":\"Can this system run boosted applications above 1 bar?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For boosted combinations requiring 2+ bar, Holley recommends the GM 12592525 MAP sensor with the 558-416 adapter harness.\"}},{\"@type\":\"Question\",\"name\":\"How should the ECU be mounted?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Terminator X Max ECU should be mounted with its diagnostic LEDs facing up.\"}}]}\u003c\/script\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":42418569379888,"sku":"GVMR_550-931","price":1849.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/terminatorxmax_v41974_62731dc0-dc19-4582-a862-d1fbb314e763.jpg?v=1758384326","url":"https:\/\/berryperformancesales.com\/products\/holley-terminator-x-max-gen-iv-truck-ls2-ls3-550-931","provider":"Berry Performance Sales","version":"1.0","type":"link"}