Holley EFI Terminator X Stealth 4150 - Black

Holley EFI Terminator X Stealth 4150 - Black

The Holley Terminator X Stealth 4150 EFI System combines the classic appearance of a carburetor with the performance, drivability, and self-learning capabilities of modern electronic fuel injection. Designed as a direct replacement for 4150-style carburetors, this system features eight 100 lb/hr injectors, self-learning fuel control, integrated ignition timing control, and a full-color touchscreen for easy setup and tuning.

Key Features

• Direct bolt-on replacement for 4150 flange carburetors
• Eight 100 lb/hr injectors support up to 650 HP N/A or 1250 HP forced induction
• Terminator X ECU with self-learning fuel map technology
• Integrated ignition timing control for improved drivability and performance
• High-resolution full-color touchscreen included
• Simple setup wizard eliminates the need for a laptop
• Includes Bosch LSU 4.9 wideband oxygen sensor for real-time learning
• Internal 1-Bar MAP sensor built into the ECU
• OEM-style TPS and IAC motors for long-term reliability

Stealth Design

• All wiring exits beneath the rear injector cover for a clean appearance
• Machined air entry accepts most factory-style air cleaners
• Timed spark vacuum port located beneath the front fuel bowl
• Available in Black, Shiny, and Gold finishes

Transmission Compatibility

• Integrated transmission kickdown provisions for GM TH350/TH400
• Compatible with GM 200R4 and 700R4 transmissions
• Compatible with Ford C4 and C6 transmissions
• Terminator X Max versions provide control of pre-2009 GM 4L60E and 4L80E transmissions

Important: An external fuel pressure regulator is required and should be set to a base fuel pressure of 58.5 PSI (such as Holley P/N 12-886).

Note: Supports naturally aspirated and forced induction applications while maintaining the appearance of a traditional carburetor.