Terminator X Max puts complete control of a GM LS Gen IV 4.8/5.3/6.0 truck engine or LS2/LS3 in one compact ECU, replacing a junkyard controller with real-time fuel learn, self-learning fuel strategies, and Holley's proven EFI tuning technology, plus 4L60E/4L80E transmission control.
Key Features:
- Built for GM LS Gen IV 4.8/5.3/6.0 truck engines and LS2/LS3 with 58x crank, 4x cam, EV6 injectors, and 4L60E/4L80E transmission control
- Real-time fuel map learn takes the guesswork out of tuning the base fuel table
- High-impedance injector drivers safely power most stock LS and Holley EFI injectors
- Bosch LSU 4.9 wideband oxygen sensor included for accurate AFR reading and tuning control
- On-board 1-bar MAP sensor, ideal for N/A or nitrous combinations
- 4 programmable inputs and 4 programmable outputs for fans, boost control, nitrous, and more
- Boost control and nitrous control tables, plus advanced custom tables
- 3.5 in. touchscreen handheld with calibration wizard, internal data logging, and customizable gauge display
- Compact ECU mounts virtually anywhere (diagnostic LEDs must face up)
- Plug-and-play compatible with Holley EFI gauges, shift lights, modules, and digital/pro dashes
- Free EFI tuning software for full laptop access
Specifications:
- Engine: Gen IV GM Truck 4.8/5.3/6.0 and LS2/LS3
- Crank Reluctor: 58x, 4x Cam
- Injector Connector: EV6
- Transmission Control: 4L60E/4L80E
- Handheld Included: Yes, 3.5 in. touchscreen
- Part Number: 550-918
Not recommended for 4x4 applications with electronic transfer cases, or for 4L6X transmissions from model year 1995 or earlier. Not intended for marine use, though it can be used off-road with proper mounting and wiring protection.
FAQ
What engines does 550-918 fit?
GM LS Gen IV 4.8/5.3/6.0 truck engines and LS2/LS3, with a 58x crank/4x cam reluctor and EV6 injectors.
Does it control the transmission?
Yes, it includes 4L60E/4L80E transmission control.
Is a handheld tuner included?
Yes, a 3.5 in. touchscreen handheld with a calibration wizard.
Can this be used on a 4x4 vehicle?
It's not recommended for 4x4 applications with electronic transfer cases.
