Skip to main content

Holley EFI Terminator X Stealth 4150 2x4 - Black

Part # 550-1075

8 Injectors - 800-1500 HP

Read More

Holley EFI Terminator X Stealth 4150 2x4 - Black

Not Available

The Terminator X Stealth 4150 2x4 EFI systems from Holley features 8, 100LB/HR Fuel Injectors capable of supporting up to 1500 HP naturally aspirated or 1250 HP on forced induction applications. The Terminator X ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower.

Features:

  • Supports up to 1500 HP Naturally Aspirated or 1250 HP Forced Induction with Eight 100 Lb/Hr Injectors
  • Available in 3 finishes: Shiny, Black, and Gold
  • Included weld-in O2 sensor bung for the exhaust ensures a leak free oxygen sensor installation
  • Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
  • Plug and play with Holley EFI Accessories, such as the 12.3” and 6.86” Pro Dash; CAN EGT; and Digital Analog style EFI gauges
  • Integrated ignition timing control
  • Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
  • High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
  • Internal 1bar MAP sensor, built into the Terminator X ECU
  • Bolt on 2x4 4150 Flange Carburetor Replacement
  • External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as Holley part # 12-886
  • OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service
  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!

About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!

Accelerometer SupportYes
Air Metering StyleSpeed Density
Boost ControlYes
Brand Holley EFI
CAN-BUS SupportYes
CategoryAir and Fuel Delivery
CFM950
Coil Per Cylinder Ignition SupportYes
ColorBlack
Datalogging SupportYes
Distributor IncludedNo
Dry Nitrous ControlYes
e85 SupportNo
EGT SupportYes
Emission Code3
FinishBlack
Flange Size4150
Flange StyleSquarebore
Forced Induction SupportYes
Fuel Filter IncludedNo
Fuel Hose IncludedNo
Fuel Injectors IncludedYes
Fuel Pressure58.5 PSI
Fuel Pressure Regulator IncludedNo
Fuel Pump IncludedNo
Grade TypePerformance
Handheld IncludedYes
Ignition Timing ControlYes
Ignition TypeUniversal
Individual Cylinder Fuel CorrectionsNo
Injector Size100 lb/hr @ 58.5 PSI
Inlet / Outlet Size6AN
Intake Manifold IncludedNo
Knock Retard SupportYes
MAP Sensor1bar
Max Horsepower Rating1500
Multi-Stage Nitrous ControlYes
Part TypeFuel Injection Conversion Kit
Product TypeEFI System
Progressive Nitrous ControlYes
Self-TuningYes
Sub CategoryService Kits
Terminator LS OptionsFuel, Spark
Throttle Bore1.75 in.
Throttle Position Sensor IncludedYes
Traction Control SupportYes
User-TuneableYes
Wet Nitrous ControlYes
UPC090127130407
Part Number550-1075
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

*Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.