Holley Terminator X Stealth 4500 2x4 EFI Fuel Injection Systems 550-1081 Systems, X, 4500, EFI, Eight Injector, Dual Throttle Body, Speed Density, Aluminum, Black, Tunable, Kit
Holley Terminator X Stealth 4500 2x4 EFI Fuel Injection Systems 550-1081 Systems, X, 4500, EFI, Eight Injector, Dual Throttle Body, Speed Density, Aluminum, Black, Tunable, Kit
A$8,015.96
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:16:48
Features
Vehicle Compatibility and Return Conditions.
This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.
Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.
Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Holley, Hilborn, Holley Efi, Retrobright, Terminator X |
| StreetFX SKU | hly550-1081 |
| SFX Item ID | 4783889 |
| Accounting SKU | hly-550-1081 |
| Manufacturer SKU | 550-1081 |
| Manufacturer UPC | 090127130247 |
| Alternative References | 550-1081, HLY-550-1081, HOL550-1081 |
Fuel Injection Systems, Terminator X, Stealth 4500, 2x4 EFI, Eight Injector, Dual Throttle Body, Speed Density, Aluminum, Black, Tunable, Kit
Holley Terminator X Stealth 4500 2x4 EFI fuel injection systems feature eight 100lb./hr. fuel injectors capable of supporting up to 1,500 hp naturally aspirated or 1,250 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. Holley Terminator X Stealth EFI systems are designed to fit with Gen 3 Ultra Dominator air cleaners and fuel crossovers, allowing you to easily convert your 4500 equipped 800+ hp dragster or door car!
Features:
• Bolt-on 4500 flange carburetor replacement for 2x4 intake manifolds
• 2.125 in. throttle plates flow 1,440 cfm each for large cubic inch engines
• Gen 3 Ultra Dominator-style 4-bolt air cleaner flange offering many air cleaner options
• Universal engine harness allows you to easily install the Terminator X 2x4 4500 system on a wide variety of engine combinations
• Timing control support integrated within the ECU using supporting components
• High-resolution, full-color touch screen for initial setup, tuning, and gauge displays
• Simple Calibration Wizard--laptop not required
• Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI
• The included genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time Fuel Map Learn
• Weld-in oxygen sensor bung for the exhaust ensures a leak-free installation
• Plug-and-play with Holley EFI accessories (Pro Dash; CAN EGT; and Digital Analog-style EFI gauges)
• Available in two finishes, Shiny and Black
| Product Attributes | |
|---|---|
| Brand | Holley |
| Manufacturer's Part Number | 550-1081 |
| Part Type | Fuel Injection Systems |
| Product Line | Holley Terminator X Stealth 4500 2x4 EFI Fuel Injection Systems |
| UPC | 090127130247 |
| Fuel Injection Style | Throttle body |
| Fuel Injection System Type | Dual 4-Barrel Throttle Bodies (4500 Flange) |
| Maximum Horsepower with Gas | 1,500 |
| Timing Control Compatible | Yes |
| ECM Included | Yes |
| Self Tuning | Yes |
| User Tunable | Yes |
| Fuel System Included | None |
| Ignition System Included | None |
| Power Distribution Included | None |
| User Interface Included | 3.5 in. display |
| EGR | No |
| Transmission Controller Included | No |
| Metering Style | Speed density |
| Multi-Port Fuel Rails Included | No |
| Throttle Body Included | Yes |
| Throttle Body Mounting Flange | 4-barrel square bore |
| Venturi Quantity | 8 |
| Venturi Diameter (mm) | 53.98mm |
| Airflow Rate (cfm) | 2,880 cfm |
| Throttle Body Material | Cast aluminum |
| Throttle Body Color | Black |
| Injectors Included | Yes |
| Injector Size (lbs/hr) | 100 lbs./hr. |
| Calibration Module Included | Yes |
| Wiring Harness Included | Yes |
| Oxygen Sensor Included | Yes |
| Fuel Pressure Regulator Included | No |
| MAP Sensor Included | Yes |
| IAT Sensor Included | Yes |
| TPS Sensor Included | Yes |
| IAC Motor Included | Yes |
| Quantity | Sold as a kit. |
| Notes | External fuel pressure regulator required, set to a base pressure of 58.5 psi. |
| Special Attention | Two throttle body system supports up to 1,250 hp on forced induction applications. |
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