{"product_id":"holley-terminator-x-max-ls1-ls2-ls6-550-929","title":"Holley Terminator X Max, GM LS1\/LS2\/LS6, DBW, EV1 | 550-929","description":"\u003cp\u003eTake control of your GM LS1\/LS6 engine with Terminator X Max. This self-learning EFI system pairs real-time fuel-learn strategies with high-impedance injector drivers, an integrated 1-bar MAP sensor, and four programmable inputs and outputs for electric fans, boost control solenoids, progressive nitrous control, and more. Part number 550-929 adds Drive-By-Wire throttle body control, and the kit ships loaded with base maps for common LS combinations so you can get out of the garage fast.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBuilt for GM LS1\/LS6 engines with a 24x crank reluctor, Drive-By-Wire throttle body, and EV1 injectors\u003c\/li\u003e\n\u003cli\u003eReal-time fuel map learn takes the guesswork out of tuning the base fuel table\u003c\/li\u003e\n\u003cli\u003eHigh-impedance injector drivers safely power most stock LS and Holley EFI injectors (does not control low-impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIncludes Bosch LSU 4.9 wideband oxygen sensor for accurate AFR feedback and precise tuning control\u003c\/li\u003e\n\u003cli\u003eOn-board 1-bar MAP sensor, ideal for naturally aspirated or nitrous combinations (2+ bar combos need GM 12592525 with adapter 558-416)\u003c\/li\u003e\n\u003cli\u003eMAP sensor vacuum hose adapters included (1\/8\", 1\/4\", and 3\/16\")\u003c\/li\u003e\n\u003cli\u003e4 inputs (12V, ground, 5V, frequency) for extra sensors or activation triggers such as nitrous or a trans-brake\u003c\/li\u003e\n\u003cli\u003e4 outputs (ground, PWM-) for fans, boost control, nitrous control, or an IAC kit\u003c\/li\u003e\n\u003cli\u003eBoost control strategies: Boost vs. Time, Boost vs. Gear, Boost vs. RPM, Boost vs. Speed, and Boost Safeties\u003c\/li\u003e\n\u003cli\u003eNitrous control: single channel wet or dry, progressive or non-progressive, with rich\/lean safeties and target closed-loop AFR\u003c\/li\u003e\n\u003cli\u003eAdvanced tables: four 1D tables, one 1D-per-gear table, four 2D tables, and one 2D-per-gear table for custom logic like flex-fuel offset or fuel\/oil pressure safeties\u003c\/li\u003e\n\u003cli\u003eOn-board diagnostic LEDs cover ECU power, engine run, wideband status, TPS calibration, crank signal, and cam signal\u003c\/li\u003e\n\u003cli\u003eIncluded 3.5\" touchscreen handheld provides a calibration wizard, internal data logging, and a customizable gauge display\u003c\/li\u003e\n\u003cli\u003eCompact ECU mounts virtually anywhere as long as the diagnostic LEDs face up\u003c\/li\u003e\n\u003cli\u003ePlug-and-play compatible with Holley EFI gauges, shift lights, and digital\/pro dashes (P\/N 553-106, 553-111, 553-112)\u003c\/li\u003e\n\u003cli\u003eFree EFI tuning software included for full laptop-level control\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEngine\/Platform: GM LS1\/LS2\/LS6\u003c\/li\u003e\n\u003cli\u003eCrank Reluctor: 24x, 1x cam\u003c\/li\u003e\n\u003cli\u003eInjector Connector: Jetronic\/Minitimer (Bosch EV1)\u003c\/li\u003e\n\u003cli\u003eDrive-By-Wire: Yes\u003c\/li\u003e\n\u003cli\u003eTransmission Control: None\u003c\/li\u003e\n\u003cli\u003eMAP Sensor: 1-bar, integrated\u003c\/li\u003e\n\u003cli\u003eHandheld Included: Yes, 3.5\" touchscreen\u003c\/li\u003e\n\u003cli\u003eIncludes: 24x LS main harness, EV1 injector harness, DBW throttle body harness, Terminator X Max ECU, ECU main power harness, Bosch LSU 4.9 wideband oxygen sensor, input\/output harness, and assorted vacuum adapters\u003c\/li\u003e\n\u003cli\u003eRecommended Pedal: P\/N 10379038\u003c\/li\u003e\n\u003cli\u003ePart Number: 550-929\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTerminator X ECUs must be mounted with the LEDs facing up. This kit is designed to work with GM throttle body P\/Ns 12570790 and 12580760 and GM throttle pedal P\/N 10379038. The ECU is not recommended for marine applications but can be used off-road as long as it's mounted in a dry, protected location away from heat with proper wiring management.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eWhat engines is Terminator X Max 550-929 built for?\u003c\/h5\u003e\u003cp\u003eIt's built for GM LS1\/LS6 engines with a 24x crank reluctor, EV1 injectors, and Drive-By-Wire throttle body control.\u003c\/p\u003e\u003ch5\u003eDoes this kit include a handheld tuner?\u003c\/h5\u003e\u003cp\u003eYes, it includes a 3.5\" touchscreen handheld with a calibration wizard, internal data logging, and a customizable gauge display.\u003c\/p\u003e\u003ch5\u003eCan it control low-impedance injectors?\u003c\/h5\u003e\u003cp\u003eNo, the high-impedance injector drivers safely power most stock LS and Holley EFI injectors but will not control low-impedance injectors.\u003c\/p\u003e\u003ch5\u003eWhat MAP sensor range does the on-board sensor support?\u003c\/h5\u003e\u003cp\u003eThe integrated MAP sensor is 1-bar, which is ideal for naturally aspirated or nitrous combinations; boosted 2+ bar applications require GM sensor 12592525 with Holley adapter 558-416.\u003c\/p\u003e\u003ch5\u003eHow should the ECU be mounted?\u003c\/h5\u003e\u003cp\u003eTerminator X ECUs must be mounted with the diagnostic LEDs facing up, in a dry, protected location away from heat.\u003c\/p\u003e\u003ch5\u003eIs this ECU approved for marine use?\u003c\/h5\u003e\u003cp\u003eNo, it's not recommended for marine applications, though it can be used in off-road applications with proper protection and wiring management.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What engines is Terminator X Max 550-929 built for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It's built for GM LS1\/LS6 engines with a 24x crank reluctor, EV1 injectors, and Drive-By-Wire throttle body control.\"}},{\"@type\":\"Question\",\"name\":\"Does this kit include a handheld tuner?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, it includes a 3.5\\\" touchscreen handheld with a calibration wizard, internal data logging, and a customizable gauge display.\"}},{\"@type\":\"Question\",\"name\":\"Can it control low-impedance injectors?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, the high-impedance injector drivers safely power most stock LS and Holley EFI injectors but will not control low-impedance injectors.\"}},{\"@type\":\"Question\",\"name\":\"What MAP sensor range does the on-board sensor support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The integrated MAP sensor is 1-bar, which is ideal for naturally aspirated or nitrous combinations; boosted 2+ bar applications require GM sensor 12592525 with Holley adapter 558-416.\"}},{\"@type\":\"Question\",\"name\":\"How should the ECU be mounted?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Terminator X ECUs must be mounted with the diagnostic LEDs facing up, in a dry, protected location away from heat.\"}},{\"@type\":\"Question\",\"name\":\"Is this ECU approved for marine use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, it's not recommended for marine applications, though it can be used in off-road applications with proper protection and wiring management.\"}}]}\u003c\/script\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":42418617385008,"sku":"GVMR_550-929","price":1849.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/terminatorxmax_v41974_8a211f20-cd4b-4aa6-bdbe-3f2d2f097f8c.jpg?v=1758387849","url":"https:\/\/berryperformancesales.com\/products\/holley-terminator-x-max-ls1-ls2-ls6-550-929","provider":"Berry Performance Sales","version":"1.0","type":"link"}