550-1633-6 Terminator X Max Direct Injection Kit for GM Gen V LT4 Late-Style Engine w/6L80E, 6L90E Trans. Control [LT DBW T/B]

Name: 550-1633-6 Terminator X Max Direct Injection Kit for GM Gen V LT4 Late-Style Engine w/6L80E, 6L90E Trans. Control [LT DBW T/B]
Brand: HOLLEY
SKU: 510-550-1633-6
Price: 3271.95 USD
Availability: InStock

^$3,271⁹⁵$3849.95You Save$578.00

Ships on 09/16/2026

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GM LT

Terminator X Max Direct Injection Kit

GM Gen V LT4 Engines

Early-Style Engines w/4-Pin Fuel Pressure Sensor

GM 6L80E and 6L90E Transmission Control

GM LT Throttle Body Drive-By-Wire Control

Tune Using Included 3.500 in. Handheld

Holley 550-1633-6 Terminator X Max Direct Injection Kit Features:

Plug and play GM Gen V LT4 engine control including GDI and VVT support
GM 6L80E and 6L90E Transmission Control
Ideal for swapping a late model GM Gen V LT4 engine and a 6L80E or 6L90E transmission into a vintage vehicle
3.5 in. handheld gets your engine running in no time with a step-by-step calibration wizard
GM LT Drive-by Wire Throttle Body Control
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 to identify any critical engine issues at a glance
Built in 1-bar MAP Sensor or for Boosted applications disable the internal MAP sensor, and utilize an external LT MAP Sensor, the harness comes with the terminated connector
4 Inputs: 12 volt, Ground, 5 volt, and Frequency for 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 fans, boost control, nitrous control, IAC kit, etc.
Boost Control: Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, and Boost Safeties
Nitrous Control: Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
Advanced Tables: 4 x 1D Tables, 1 x 1D per Gear Table, 4 x 2D Tables, 1 x 2D per Gear Table
Integrated data logging to the 3.5 in. Handheld SD Card
EFI Tuning Software for complete control of your engine

Holley 550-1633-6 Terminator X Max Direct Injection Kit Notes:

This 550-1633-6 is for early Gen V LT4 engines that use a 4-pin fuel pressure sensor connecter
For later Gen V LT4 engines with a 3-pin fuel pressure sensor connecter use Holley 550-1634-6

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Standalone Engine Management Systems

Holley EFI has delivered the Terminator X and Terminator X Max standalone engine management systems (EMS) for swappers to take full control of their fuel-injected or multi-point fuel injected (MPFI) engines. Terminator X systems design is a simple plug-and-play unit incorporating self-learning technologies without needing any tuning interfaces, which is often required when using a factory power-train control module (PCM). Terminator X kits offer engine control, while Terminator X Max kits offer both engine and transmission control. Power adders such as nitrous and boost can easily be handled with custom settings and features, making these Terminator X kits ideal street and strip ECMs.

Part TypeEngine Control Module

Product LineHolley EFI Terminator X & Terminator X Max MPFI Controllers

BrandHOLLEY

Package Height9.5

Package Width14.5

Package Length25.5

Weight8.0 PG

Part CategoryPerformance Parts

Map Sensor Range (Bar)1 bar

QuantitySold as a Kit

Injection StyleDirect

Engine Management System Component TypeElectronic control module