Holley EFI Terminator X Stealth 4150 – Gold

Holley EFI Terminator X Stealth 4150 – Gold

The Holley EFI Terminator X Stealth 4150 – Gold is a bolt-on 4150 flange EFI system designed to replace carburetors on American V8 engines. Featuring four 100 lb/hr fuel injectors, it supports up to 650 HP naturally aspirated and 600 HP with forced induction. This system offers advanced self-tuning fuel mapping, ignition timing control, and a stealthy design with wiring concealed beneath the rear fuel injector cover for a clean installation.

Key Features

• Bolt-on 4150 flange carburetor replacement with 1.75 in. throttle bore
• Four 100 lb/hr injectors supporting up to 650 HP naturally aspirated
• Internal 1 bar MAP sensor and integrated ignition timing control
• High-resolution full-color touchscreen handheld for setup and tuning, no laptop required
• Self-learning fuel map with included Bosch LSU 4.9 wideband oxygen sensor
• Supports boost, dry nitrous, multi-stage and progressive nitrous control
• CAN-BUS, datalogging, knock retard, and accelerometer support included
• Transmission kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6

Fitment

• Fits carbureted American V8 engines with 4150 squarebore flange
• Compatible with GM TH350/400, 200R4/700R4, and Ford C4/C6 transmissions for kickdown control

Note: External fuel pressure regulator (58.5 PSI) required; Holley part #12-886 recommended. Verify compatibility before ordering. Installation requires basic EFI knowledge and supporting components such as fuel pump and fuel lines are not included.