Holley EFI Terminator X Stealth 4150 – Black (4 Injectors)

Holley EFI Terminator X Stealth 4150 – Black

The Holley EFI Terminator X Stealth 4150 – Black is a bolt-on EFI system designed to replace 4150 flange carburetors, supporting up to 650 HP naturally aspirated or 600 HP forced induction engines. Featuring self-tuning capabilities and integrated ignition timing control, it delivers improved idle stability, drivability, and throttle response for American V8 enthusiasts seeking reliable performance upgrades.

Key Features

• Bolt-on 4150 squarebore flange for easy carburetor replacement
• Four 100 lb/hr fuel injectors supporting up to 650 HP naturally aspirated
• Self-tuning ECU with fuel map learning and ignition timing control
• Internal 1 bar MAP sensor and universal ignition compatibility
• High-resolution full-color touchscreen handheld included for setup and tuning
• Supports boost, dry nitrous, multistage and progressive nitrous control
• CAN-BUS and datalogging support with included Bosch LSU 4.9 wideband oxygen sensor
• Transmission kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6

Fitment

• Fits engines with 4150 squarebore carburetor flange
• Compatible with a wide range of domestic V8 engines up to 650 HP

Note: External fuel pressure regulator (58.5 PSI) required; Holley part #12-886 recommended. Verify compatibility with your transmission and engine setup before ordering. Distributor and mounting hardware not included.