-10% Terminator X Stealth 4500 TBI Systems

Terminator X 4500: They Call It Dominator For A Reason

When Holley, working in conjunction with Ford's Grand National racing program, introduced a new completely new carburetor footprint back in 1969, the name Dominator was selected from thousands of entries to the "Name The Carb Contest". And how accurate that name was.  Over 50 years later and now produced by every legitimate racing carburetor manufacturer there is still no real competitor in the four-barrel throttle body market to 4500 carburetors and throttle bodies.

And because the Terminator X family of fuel injection ECU's has features that the hard-core racer longs for, it only makes sense that Holley coupled it with this massive 1440 CFM, four by 2.125-inch barrel behemoth to produce what we believe is currently the most dominating throttle body injection system available today.

Terminator X Throttle Body Injection (TBI) EFI Systems are similar to the original Terminator Stealth EFI Systems but feature the much more budget-friendly Terminator X and Terminator X-Max ECU rather than the HP and Dominator ECUs of the original Terminator EFI Systems.

By adding the Terminator X Stealth to the existing Terminator TBI and Terminator Stealth TBI EFI Systems, Holley has dropped the price of admission to this advanced level of throttle body injection by hundreds of dollars while sacrificing features that the majority of users will never miss. And now that the Terminator X family has added the Stealth 4500 throttle body it is reaching a market (not to mention a performance level) that the standard Terminator TBI family (currently limited to the 4150 throttle body) could never reach.

To see a very detailed listing of the differences in capability between the Terminator X/X-Max and the HP/Dominator ECUs used by the original Terminator TBI and Terminator Stealth TBI EFI Systems, look here.

Terminator X Unique Features

  • 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 or Black 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 X 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*
  • Fully Programmable I/O
  • Customizable Sensors
  • Alpha-N Load Sensing
  • More Advanced Boost Control
  • Staging Assist
  • Multiple Timing Control Options:
    • Holley Dual-Sync Distributor*
    • Holley HyperSpark Distributors*
    • GM Small Cap HEI Distributor*
    • Ford TFI Distributor*

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

What's Included

The Each Terminator X 4500 EFI System includes the following:

  • Stealth Throttle Body with:
    • 100 PPH Fuel Injectors (@ 60 PSI) (x8)
    • 1-BAR MAP Sensor
    • Throttle Position Sensor
    • Idle Air Control (IAC) System
  • Holley Terminator X® 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

What If I Need Transmission Control?

Then you've come to the right place! Holley does NOT offer the Terminator X 4500 Stealth with transmission control--but we do! Select the option above to order yours with the advanced Terminator X-Max ECU and harness for the GM 4L60E (pre-2009), 4L65E, 4L70E, 4L80E, and 4L85E transmission. Have a Post-2009 4L60E a Ford 4R70W/4R75W or a Chrysler 46RE transmission? Contact us--we can hook you up.

What Else Will I Need?

Required:  EFI Fuel System with

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


Optional: Components to control ignition timing.

Fuel System Upgrade Options

You probably recognize that you need to upgrade your fuel system if you're upgrading from a carburetor to this Terminator X TBI kit. Fortunately, you have a lot of great options! We have fuel pump modules to fit a broad assortment of gas tanks as well as complete EFI fuel tank systems fit many popular muscle cars and trucks. 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 X 4500 Stealth 4-BBL Throttle Body Fuel Injection System

Boost ControlYes (Additional Hardware Required)
DIS OutputsYes (Harness Upgrade Required to Access)
FamilyTerminator X
Fueling StrategySpeed Density, Alpha-N, or Combination
Includes Power HarnessYes
Injector DriversEight
Internal Datalogging4GB
Knock Control ChannelsYes (Sensor Required to Access)
Nitrous ControlYes (Additional Hardware Required)
Number of Cylinders4, 6, or 8 (Even Fire Only)
User Configurable I/OYes
User-Selectable MAP StorageNo
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)100 PPH (at 60 PSI)
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 (Internal), Throttle Position (Integrated in TB); Coolant Temperature, Wideband O2 and Air Temperature Sensor; Fuel Pressure Sensor optional, not included. External MAP to 5 Bar options, not included.
Also Included40-Amp Relay.
ApplicationUniversal (Requires intake manifold for square bore carburetor or adapter there-to)
ColorAvailable in Polished, Hard Core Gray, or Classic Gold Throttle Body
Emission Code3
Unit of SaleKit

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Terminator X Stealth 4500 TBI Systems

  • Views: 17111
  • Brand: Holley EFI
  • Product Code: 550-1070 | 550-1071
  • Availability: In Stock
  • $3,143.00
  • $2,827.95

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