-40% Terminator Stealth Universal 4BBL TBI Systems

Note: These original Terminator Stealth EFI systems are all gone except a handful of the great 550-442 Shiny with Transmission Control (Dominator ECU.) When these are gone the original Terminator Stealth EFI will be no more!

Terminator Throttle Body Injection (TBI) EFI Systems were Holley's original 4150-carburetor replacement EFI Systems.  Predating the Sniper EFI System, these include one of Holley's high-end HP or Dominator ECU's mated with a 4-barrel throttle body with four 80 pound-per-hour injectors.  Air flow is an impressive 950 CFM, making this an appropriate choice for naturally aspirated engines up to about 600 HP or boosted engines to about 480 HP (gasoline.)  Optionally, an injector upgrade is available that will allow naturally aspirated horsepower levels up to the limit for 950 CFM of airflow (roughly between 700 and 800 HP) and over 1000 HP boosted.

  • Easy to install
  • No computer experience required
    • Handheld tuner included
    • Simple multiple choice set-up wizard
  • Self-tunes while you drive
  • Optional Laptop Tuning capability (no cost--free download.)
  • Available in Polished (550-440 & 550-442), Hard Core Gray (550-441, & 550-443), or Classic Gold (550-444 & 550-445) Throttle Body

Fits all standard square flange intake manifolds. Connections for Ford, GM TH350 and 700R4, and other transmission linkages.

While similar in scope to the Sniper EFI systems, the Terminator TBI systems have some features that set them apart from Sniper. To name a few:

  • Remote-Mounted ECU typically much less sensitive to radio frequency interference (RFI)
  • Capability to drive Holley EFI Fuel and Oil Pressure gauges*
  • Knock Sensor Capability*
  • Water Methanol Injection Capability*
  • Internal Data Logging
  • Fully Programmable I/O
  • Customizable Sensors
  • Alpha-N Load Sensing
  • More Advanced Boost Control
  • 8 stages of Nitrous
  • Traction Control*
  • Staging Assist
  • Transmission Control
  • Timing Control Compatibility with GM HEI or Ford TFI Ignitions*

*Requires additional hardware not included in the basic Terminator TBI system.

What's Included

The Each Terminator EFI System includes the following:

  • Terminator Throttle Body with:
    • 80 PPH Fuel Injectors (x4)
    • 1-BAR MAP Sensor
    • Throttle Position Sensor
    • Idle Air Control (IAC) System
  • Holley HP® or Dominator® ECU
  • Bosch Wideband Sensor and Weld Bung
  • Coolant Temperature Sensor
  • 3.5-inch Handheld LCD Touchscreen Display
  • Main Wiring and Power Harness
  • I/O and Ignition Adapter Harnesses
  • Brackets, Gaskets, and Fasteners

How Is Terminator Stealth Different?

The primary difference between the Terminator Stealth TBI System and the standard Terminator TBI System is primarily the look. While the standard Terminator TBI offers a bit more modern throttle body, the Stealth throttle body is purposely intended to mimic the look of a carburetor--and it does that quite nicely. There is a slight difference in the layout of the sensors inside of the different throttle body's covers but that is completely transparent and immaterial to the user. It does require that the two throttle bodies use a different throttle body harness, but since these harnesses are integral to the throttle body, plug into a common main harness, and are not normally installed, replaced, or removed by the user, it means that you can simply pick the look you like and go with it.

What Else Will I Need?

Required:  EFI Fuel System with

  • EFI Fuel Pump
  • Pre- and Post-Pump Filters
  • Fuel Pressure Regulator (43.5 PSI Return-Style)
  • Associated Hose, Hose Ends, Clamps, Adapters, Etc.


Optional: Components to control ignition timing.

Available With Transmission Control

Owners of vehicles with the GM 4L60E, 4L65E, or 4L80E transmissions are really going to like this--the Terminator Univeral Throttle Body EFI System is available with transmission control for these popular transmissions. Easy setup on the handheld display using the same setup wizard that creates the configuration for EFI control. Once configured you can use the handheld to fine-tune the upshift and downshift points, WOT upshift, torque converter clutch parameters, and more. You can even tune the line pressure vs. TPS or MAP for each gear!

Fuel System Upgrade Options

You probably recognize that you need to upgrade your fuel system if you're upgrading from a carburetor or the old GM throttle-body injection to this Terminator TBI kit. Fortunately, you have a lot of great options! We have fuel pump modules to fit a broad assortment of gas tanks, complete EFI fuel tank systems fit many popular muscle cars and trucks, and you can even choose to order your Terminator 4BBL TBI system as a Master Kit with all of the components shown in this image. If you have any questions at all, just contact us and we can help design a fuel system that is perfect for your application!

Not Sure? Review this product documentation before you buy!

Owners Manual
Holley Terminator 4-BBL Throttle Body Fuel Injection System

Boost ControlYes (Additional Hardware Required)
DIS OutputsNone
Fueling StrategySpeed Density
Includes Power HarnessYes
Injector DriversFour
Internal Datalogging4GB
Knock Control Channels0
Nitrous ControlYes (Additional Hardware Required)
Number of Cylinders4, 6, or 8 (Even Fire Only)
User Configurable I/OYes
User-Selectable MAP StorageTransmission Control Version Only
Water-Methanol ControlYes (Additional Hardware Required)
Displays And Controllers
Auto BrightnessNo
CAN Bus CapableYes (Specific to Holley ECUs Only)
Case/Bezel FinishBlack
ConfigurableMonitor dozens of pre-configured metrics provided by the ECU, including sensors, air/fuel ratio, switched outputs, drive-by-wire data, and more.
Data LoggingYes
Display TypeLCD
FunctionsSetup, Monitor, Tuning
Gauge/Display Size3.5 Inch Rectangular
Internal StorageYes (SD Card)
Throttle Bodies
Airflow Rate (CFM)950 CFM
Barrels (BBL)4
Gaskets IncludedYes
IAC Motor IncludedYes
Injectors IncludedYes
StyleThrottle Body Injection
Throttle Bore Diameter (ea)44.45mm
TPS Sensor IncludedYes
Fuel Injectors
Flow Rate (Lbs / Hr)80 PPH
Harness TypePower Harness, Main Harness, TBI Injector Sub-Harness, I/O Harness, Ignition Adapter. Transmission Harness included on transmission control version
Crank Timing
Sensor Harness IncludedNo (Ignition Adapter Only)
Type1 BAR MAP, Throttle Position (Integrated in TB); Coolant Temperature, Wideband O2 and Air Temperature Sensor; Fuel Pressure Sensor optional, not included
Also Included40-Amp Relay.
ApplicationUniversal (Requires intake manifold for square bore carburetor or adapter there-to)
ColorAvailable in Polished (550-440 & 550-442), Hard Core Gray (550-441, & 550-443), or Classic Gold (550-444 & 550-445) Throttle Body
Emission Code3
Unit of SaleKit

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Terminator Stealth Universal 4BBL TBI Systems

  • Views: 25070
  • Brand: Holley EFI
  • Product Code: 550-442
  • Availability: In Stock
  • $4,198.47
  • $2,519.08

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