The Holley Terminator LS MPFI Kit brings the self-tuning simplicity of Terminator EFI to GM's popular LS engines in a bolt-on package. The 550-615 kit controls fuel, spark, and drive-by-wire through Terminator's 3.5" touchscreen — install it, answer a few basic setup questions, and drive. No laptop is required.
Key Features:
- Designed for 1997-2007 4.8/5.3/6.0 truck engines with a 24x crank reluctor and drive-by-wire throttle
- Kit includes everything needed to control a stock or mildly modified LS engine
- Bosch wideband oxygen sensor included
- Controls fuel, spark, and drive-by-wire from one system
- Pre-calibrated for no-hassle installation and tuning
- Fully adjustable through the included 3.5" full-color touchscreen
Specifications:
- Engine Platform: GM LS, 1997-2007 4.8/5.3/6.0 truck engines
- Crank Reluctor: 24x
- Injector Connector: Multec 2
- Handheld Included: Yes, 3.5" touchscreen
- Drive-By-Wire: Yes
- Terminator LS Options: Fuel, spark, drive-by-wire
- Color: Black
- What's Included: ECU, harness, 3.5" touchscreen, Bosch wideband oxygen sensor
- Part Number: 550-615
Built specifically for 24x-reluctor, drive-by-wire LS truck engines; verify your engine's crank reluctor type and throttle configuration before ordering.
FAQ
What engines does the 550-615 fit?
It's built for 1997-2007 GM 4.8/5.3/6.0 truck engines equipped with a 24x crank reluctor and drive-by-wire throttle.
Do I need a laptop to install and tune it?
No. The kit is pre-calibrated and fully adjustable through the included 3.5" full-color touchscreen — no laptop required.
What does the Terminator LS system control?
It controls fuel, spark, and drive-by-wire throttle all from the same ECU and touchscreen.
What oxygen sensor is included?
A Bosch wideband oxygen sensor ships with the kit.
What injector connector type does this kit use?
Multec 2 injector connectors.

