Holley EFI Terminator X Stealth 4150 – Black (8 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 your 4150 flange carburetor, delivering up to 1250 HP on forced induction or 650 HP naturally aspirated engines. It features advanced self-tuning capabilities and integrated ignition timing control for improved idle stability, drivability, and performance, making it ideal for domestic V8 enthusiasts seeking a powerful and reliable fuel injection upgrade.

Key Features

• Includes 8 x 100 lb/hr fuel injectors supporting up to 1250 HP forced induction or 650 HP naturally aspirated
• Built-in 1 bar MAP sensor and ignition timing control for enhanced tuning and performance
• High-resolution full-color touchscreen handheld for setup, tuning, and gauge monitoring—no laptop required
• Transmission kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 transmissions
• Stealth wiring exits below rear fuel injector cover for clean installation
• OEM style TPS and IAC included for reliable operation
• Supports boost control, dry nitrous, multi-stage and progressive nitrous control
• Compatible with wideband oxygen sensor for real-time fuel map learning

Fitment

• Fits engines with 4150 squarebore flange carburetor mounting
• Compatible with most stock style air cleaners (air entry machined accordingly)
• Designed for domestic V8 engines requiring up to 1250 HP support

Note: External fuel pressure regulator (58.5 PSI) required (e.g., Holley #12-886). Transmission control available only on select kits. Verify compatibility before ordering. Fuel pump, fuel hose, distributor, and mounting hardware are not included.