{"product_id":"holley-efi-terminator-x-max-2013-gen-iii-hemi-550-1425","title":"Holley EFI Terminator X Max Gen III HEMI EFI Controller: Chrysler \/ Dodge Ram GEN III HEMI (03-13+)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI Controller\u003c\/h3\u003e\u003cp\u003e2003–2013+ Chrysler GEN III HEMI 5.7L \/ 6.1L \/ 6.4L Engines (Non-VVT, Drive-by-Wire)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1425\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI Controller is a cutting-edge engine management system designed specifically for Chrysler GEN III HEMI engines produced from 2003 through 2013 and beyond. Compatible with 5.7L, 6.1L, and 6.4L engines equipped with the factory Drive-by-Wire throttle body (non-VVT only), this controller offers a plug-and-play solution that simplifies tuning and maximizes engine performance.\u003c\/p\u003e\u003cp\u003eWhether you are building a street-driven muscle car, a weekend track warrior, or a boosted race vehicle, the Terminator X Max provides advanced features such as real-time fuel learning, multiple programmable inputs and outputs, and comprehensive boost and nitrous control. Its intuitive 3.5” touchscreen handheld and included Holley EFI software make setup and tuning accessible for both beginners and experienced tuners alike.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is packed with versatile features engineered to enhance control and customization for your GEN III HEMI engine:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with 2003–2013+ Chrysler GEN III HEMI 5.7L, 6.1L, and 6.4L engines using factory Drive-by-Wire throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (does not support low impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIntegrated 1 bar MAP sensor with option to disable for external MAP sensor use, ideal for boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, progressive nitrous systems, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, speed, and built-in boost safeties\u003c\/li\u003e\n\u003cli\u003eNitrous control channels supporting wet or dry, progressive or non-progressive operation with rich\/lean safeties and closed-loop AFR targeting\u003c\/li\u003e\n\u003cli\u003eComprehensive tuning tables: four 1D tables, one 1D gear table, four 2D tables, and one 2D gear table for flexible calibration\u003c\/li\u003e\n\u003cli\u003eIncluded Bosch LSU 4.9 wideband O2 sensors for precise air\/fuel ratio monitoring and tuning accuracy\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld with calibration wizard, data logging, and customizable gauge displays\u003c\/li\u003e\n\u003cli\u003eCompact ECU design measuring just 7.45” x 4.1” x 1.66” for versatile mounting options\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for full laptop access and advanced tuning capabilities\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI Controller is engineered with durability and compactness in mind. Its rugged housing protects sensitive electronics while allowing for flexible installation in tight engine bays. The included EV6 (USCAR) injector harness ensures seamless integration with factory wiring, and vacuum hose adapters in multiple sizes (1\/8”, 1\/4”, and 3\/16”) facilitate straightforward sensor connections. Holley’s attention to detail extends to onboard diagnostic LEDs that provide instant visual feedback on critical engine parameters such as ECU power, engine run status, TPS calibration, and cam signal integrity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eInstallation is straightforward with the Terminator X Max’s plug-and-play design tailored for Chrysler GEN III HEMI engines from 2003 to 2013+. The system supports factory Drive-by-Wire throttle bodies and includes all necessary wiring harnesses and adapters for a clean, professional setup. No major modifications are required, making it an ideal upgrade for enthusiasts seeking enhanced engine control without extensive rewiring or fabrication. The compact ECU size allows for flexible mounting locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X Max EFI Controller ECU\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller with calibration wizard\u003c\/li\u003e\n\u003cli\u003eEV6 (USCAR) injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, and 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor installation\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for laptop\u003c\/li\u003e\n\u003cli\u003eComprehensive instructions and injector support chart\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max is perfect for enthusiasts and professional tuners alike who want a reliable, feature-rich EFI controller for their GEN III HEMI-powered vehicles. It suits a wide range of builds, from naturally aspirated street machines to boosted race cars and nitrous-injected setups. Its ease of use combined with advanced tuning capabilities makes it an excellent choice for those upgrading from factory engine management or building a custom EFI system on a budget.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668730068,"sku":"550-1425","price":2299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3463_1a5bd9a5dfd00979c2af40251c48461267ec6948_e2ba4f2c-babf-4428-a65e-b87736012606.webp?v=1766655086","url":"https:\/\/fasthemis.com\/products\/holley-efi-terminator-x-max-2013-gen-iii-hemi-550-1425","provider":"FastHemis","version":"1.0","type":"link"}