550-905
The Holley EFI Terminator X LS EFI System delivers complete standalone engine management for Gen IV GM LS truck engines, LS2, and LS3 applications equipped with a 58x crank reluctor, 4x cam sensor, and EV6 (USCAR) fuel injectors. Designed for builders who want OEM-like drivability with race-proven performance, Terminator X combines self-learning fuel control, advanced ignition management, boost control, nitrous control, and laptop tuning into one affordable package.
Whether you're completing an LS swap, building a rock crawler, Ultra4 car, prerunner, muscle car, hot rod, drift car, or street truck, Terminator X comes loaded with proven base calibrations to get your engine running quickly. The integrated Bosch LSU 4.9 wideband oxygen sensor continuously refines the fuel map while Holley's free tuning software provides complete control for advanced users. Choose between a kit with the popular 3.5" touchscreen handheld or the ECU-only version that uses a laptop for setup and tuning.
Available Options:
| Specification | Details |
|---|---|
| Engine Compatibility | Gen IV GM LS Truck, LS2, LS3 |
| Crank Trigger | 58x |
| Cam Trigger | 4x |
| Injector Style | EV6 (USCAR) |
| Transmission Control | None |
| Drive-By-Wire Support | No |
| MAP Sensor | Integrated 1-Bar |
| Wideband Sensor | Bosch LSU 4.9 |
| Injector Drivers | High Impedance Only |
| Self Learning | Yes |
| Boost Control | Yes |
| Nitrous Control | Single Stage Wet or Dry with Progressive Control |
| Inputs | 4 Programmable Inputs |
| Outputs | 4 Programmable Outputs |
| Data Logging | Yes |
| CAN Bus | Yes |
| Laptop Tuning | Included via CAN/USB Cable |
| Fuel Type Support | Gasoline and E85 |
| Knock Retard | Supported |
| Individual Cylinder Fuel Correction | Supported |
Compatible With:
Requirements:
Common Applications:
This kit is specifically designed for Gen IV GM LS truck engines, LS2, and LS3 engines using a 58x crank reluctor wheel, a 4x cam sensor, and EV6 (USCAR) fuel injectors.
550-905 includes Holley's 3.5-inch touchscreen handheld for engine setup, tuning, and monitoring. 550-905T omits the handheld and uses the included CAN/USB cable with Holley's free Terminator X software for setup and tuning.
Yes. Terminator X continuously learns and refines the fuel table using feedback from the Bosch LSU 4.9 wideband oxygen sensor, making startup and drivability improvements automatic while still allowing complete manual tuning when desired.
Yes. Terminator X includes integrated boost control, progressive wet or dry nitrous control, programmable safety strategies, and advanced tables for boost versus RPM, gear, speed, or time.
Yes. Terminator X supports numerous Holley CAN accessories including digital dashes, shift lights, gauges, and additional modules, allowing the system to grow as your project evolves.
