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Holley Terminator X Max GM Gen V LT Direct Injection Kits 550-1624 Fuel Systems, Max, LT4, Injection, ECM, Self Tuning, Power Adder Compatible, Wiring Harness, Oxygen Sensor. Late, Kit

SKU: HLY550-1624

Engine Management Systems

Holley Terminator X Max GM Gen V LT Direct Injection Kits 550-1624 Fuel Systems, Max, LT4, Injection, ECM, Self Tuning, Power Adder Compatible, Wiring Harness, Oxygen Sensor. Late, Kit

SKU: HLY550-1624

Engine Management Systems
A$5,638.30
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Ready for standalone engine management at a budget price? Take control of your GM Gen V LT1, L83, or L86 engine with a Holley Terminator X Max GM Gen V LT direct injection kit! They're available to fit early non-WT drive-by-wire engines, as well as late WT drive-by-wire engines.

Terminator X and X Max features and benefits:

* Plug-and-play GM Gen V LT engine control, including GDI and VVT support
* Ideal for swapping late model GM Gen V LT engines into vintage vehicles
* 3.5 in. hand-held gets your engine running in no time with a step-by-step calibration wizard
* GM LS and LT drive-by wire throttle body control (Terminator X Max only)
* GM 4L60 and 4L80 transmission control (Terminator X Max only)
* Included engine harness plugs directly into the factory LT DI injector sub harness
* OEM Injectors supported, with part numbers provided in the handheld wizard or software
* Genuine Bosch LSU 4.9 wideband control (will not work with LSU 4.2 oxygen sensors)
* On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal – VVT Status – Pump Control – and DI Injectors. This allows you to identify any critical engine issues at a glance
* Built-in 1 bar MAP sensor, vacuum hose adapters included (1/8th, 1/4 and 3/16ths); or for Boosted applications, you can disable the internal MAP sensor, and utilize an external LT MAP sensor. The harness comes with the connector terminated, making the installation a snap
* 4 inputs: 12 V, Ground, 5 V, and Frequency—for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure inputs are pre-terminated)
* 4 Outputs:
-- Ground
-- PWM – for accessories such as fans, boost control, nitrous control, IAC kit, and more
-- Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
-- Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
* Integrated data logging to the 3.5 in. hand-held SD card
* Free EFI tuning software for complete control of your Terminator X powerplant

Terminator X Max ECU Connections:

* J1A - Main Harness Connector: This connector is primarily an "Input" connector. It contains all the sensor inputs and wide band oxygen sensor control.
* J1B - Main Harness Connector: The second connector is the "J1B" connector (26 pin). This connector is the "output" connector. It has eight injector outputs and outputs for other devices.
* MAP Sensor: Used on N/A applications, connect directly to full manifold vacuum port on the intake manifold.
* Main Power: Connects to the Main Power Harness; these two wires MUST be wired directly to the battery terminals.
* J3: Connection point for the drive-by-wire harness.
* J4: Connection point for the transmission harness.

Part Type

Engine Management Systems

Data: v4.2 - Upd: 2026-10-13 18:47:41

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
550-1624
Product Attributes - Part Type
Engine Management Systems
Product Attributes - Product Line
Holley Terminator X Max GM Gen V LT Direct Injection Kits
Product Attributes - UPC
090127476482
Product Attributes - Transmission Controller Included
No
Product Attributes - Boost Control
Yes
Product Attributes - Traction Control
No
Product Attributes - High Impedence Injectors
Up to 8
Product Attributes - Fuel Injector Connector Style
USCAR/EV6
Product Attributes - Coils
Up to 8
Product Attributes - Ignition Coil Connector
GM LS/LT 4-pin
Product Attributes - Analog Inputs
4
Product Attributes - Wideband Controller
Yes
Product Attributes - Wideband Channels
1
Product Attributes - CANBUS Enabled
Yes
Product Attributes - CANBUS Networks
1
Product Attributes - Knock Control
Yes
Product Attributes - Knock Channels
2
Product Attributes - Drive-By-Wire Capable
Yes
Product Attributes - Drive-By-Wire Channels
1
Product Attributes - VVT Control
Yes
Product Attributes - VVT Channels
1
Product Attributes - Nitrous Control
Yes
Product Attributes - Launch Control
No
Product Attributes - Engine Protection
Yes
Product Attributes - Flex Fuel Compatible
Yes
Product Attributes - Multi-fuel Capable
No
Product Attributes - Data Logger
Yes
Product Attributes - Oxygen Sensor Included
Yes
Product Attributes - Reluctor Wheel Tooth Quantity
58
Product Attributes - Display Included
Yes
Product Attributes - Handheld Controller Included
Yes
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Fits later direct injection engines.
Product Attributes - Special Attention
Kit includes an external Gasoline Direct Injection(GDI) controller, which enables the end user to control and tune, factory injectors, GM Gen V LT Variable Valve Timing (VVT), and factory fuel pumps.

Reference Information

Brand Name/s Holley
StreetFX SKU hly550-1624
SFX Item ID 4782990
Supplier Item Code 4782990
Manufacturer SKU 550-1624
Manufacturer UPC N/A
Alternative References HOL550-1624, LT4

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2014
    Ending Year2024
    Engine TypeV8
    Engine FamilyChevy small block Gen V
    Engine Size6.2L/376
    DrivetrainRWD
    AspirationSupercharged
    TransmissionManual

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