The Holley EFI Terminator LS MPFI Kit brings the self-tuning power of Terminator EFI to GM's popular LS engines in a bolt-on package. The 550-614 kit controls fuel and spark through Terminator's 3.5" touchscreen — no laptop required. Answer a few basic setup questions and the system is ready to drive.
Key Features:
- Self-tuning EFI system for 1997-2007 4.8/5.3/6.0 truck engines with 24x crank reluctor
- Controls fuel and spark
- Includes everything needed to control a stock or mildly modified LS engine
- Bosch wideband oxygen sensor included
- Pre-calibrated for no-hassle installation and tuning
- Fully adjustable through the included 3.5" full-color touchscreen handheld
- No laptop required for setup or tuning
Specifications:
- Engine Platform: 1997-2007 GM 4.8/5.3/6.0 truck engines
- Crank Reluctor: 24x
- Injector Connector: Multec 2
- Handheld Included: Yes, 3.5" touchscreen
- Control Options: Fuel, Spark
- Color: Black
- Part Number: 550-614
FAQ
Does this kit require a laptop to set up?
No. The system is configured and tuned through the included 3.5" touchscreen handheld — answer a few basic questions and drive.
What engines is this kit designed for?
It's built for 1997-2007 GM 4.8/5.3/6.0 truck engines equipped with a 24x crank reluctor.
What does the Terminator LS kit control?
This kit (550-614) controls fuel and spark.
Is a wideband oxygen sensor included?
Yes, a Bosch wideband oxygen sensor is included for closed-loop fuel control.
Is this kit suitable for a modified engine?
It's designed for stock or mildly modified LS combinations.

