1979-85 Mustang Holley Terminator X Stealth 4150 - Gold by Holley

Price: 1783.95 USD
Availability: InStock

1979-85 Mustang Holley Terminator X Stealth 4150 - Gold

Harness full control of your 1979-1985 Mustang's power plant with a gold Terminator X Stealth 4510 from Holley!

Item #HLY-5501003
MPN# 550-1003

Sale Price: $1,783.95

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LMR showroom & will call pickup service will be closed beginning Monday 9/21/26 for renovations until further notice. Need help? Contact Us.

Benefits

Fuel Map Self Learning Capabilities
Completely Stealth Installation
Plug & Play Harnesses
On-Board Diagnostics

Features

High-Resolution Full-Color Touchscreen
Bosch LSU 4.9 Wideband Oxygen Sensor
Four 100LB/HR Fuel Injectors
Integrated Ignition Timing Control
Satin Gold Finish

What's in the Box

(1) Terminator X External ECU
(1) Bolt-on 4150 Flange Carburetor Replacement
(1) 3.5" Touchscreen LCD Handheld
(1) Bosch LSU 4.9 Wideband Oxygen Sensor
(1) Primary Engine Harness

1979-1985 Mustang Holley Terminator X Stealth 4150 - Gold
Transform your 1979-1985 Mustang's engine and gain fuel parameter control like never before with the Holley Terminator X Stealth 4150 in satin gold. Featuring an external ECU, four 100LB per hour fuel injectors, a wideband oxygen sensor, and a high-resolution full-color touchscreen display, the Terminator X supports up to 650 HP on naturally aspirated engines! Self-learning fuel mapping and integrated ignition timing control capabilities refine idle stability, improve drivability, and increase wide open throttle horsepower while onboard diagnostics, accessible from the touchscreen, allow for tuning, monitoring, and data logging in real-time. Machined for optimal airflow, the air entry location accepts most factory air cleaners with air cleaner locator provisions. A plug-and-play harness and wires that exit below the rear fuel injector cover provide the stealth appeal while maintaining a period-correct appearance!

Product Highlights

Bolt-on 4150 Flange Carburetor Replacement
Supports up to 650HP with Four 100lb/hr Injectors
Internal 1bar MAP sensor, built into the Terminator X ECU.
All of the wiring exits below the rear fuel injector cover, for a completely stealth installation
Timed spark part for vacuum-advanced distributors located under the front fuel bowl, for easy access to the distributor
Air entry is machined to fit most stock-style air cleaners with air cleaner locator provisions
Integrated ignition timing control improves idle stability, fuel economy, and wide open throttle performance
High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
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
The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn
OEM Style TPS/IAC for years of dependable service

Tuning & Software Note

Holley provides the Terminator X Tuning Software for free to completely control your power plant!
The Tuning Software Lists Injector Data For Varying Applications.

Suggested Parts

Holley AN Dual Port Fuel Line For Holley 4150 (79-85) is Required for a bolt-on installation.
Holley Dual Sync Distributor - Black (87-93) 5.0
Holley EFI ECU Mounting Bracket (79-04)
SVE Aluminum Mount For Holley Terminator X 3.5" Touchscreen (87-93)
Holley Terminator X EFI Bluetooth Module

This product is intended for off-road use only. Off-Road Disclaimer

Holley Warranty - Click Here

Ford Mustang - 1979, 1980, 1981, 1982, 1983, 1984, 1985

Fitment Notice

Fits 1979-1985 Mustang
An external fuel pressure regulator is required, set to a base pressure of 58.5 PSI. Fuel system modifications, including custom fuel lines maybe required.
Modifications to the throttle cable and transmission TV cable on automatic-equipped cars may be necessary.

Installation Instructions

Download the pdf Link opens in a new window

California Residents:

WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov

About This Brand

Holley, The Heart & Soul of Performance.

For over 100 years Holley has been proven to be an industry leader by providing Mustang enthusiasts and racers with the high performance carburetors , intake manifolds, cylinder heads, and other quality performance components needed for today's competition. Holley's performance Mustang parts are perfect for any daily driven or high horsepower race car.