Holley EFI Terminator X Max Stealth 4150 – Gold

Holley EFI Terminator X Max Stealth 4150 – Gold

The Holley EFI Terminator X Max Stealth 4150 – Gold is a universal bolt-on EFI system designed to replace 4150 flange carburetors, supporting up to 650 HP naturally aspirated or 600 HP forced induction engines. Built for American V8 enthusiasts seeking improved drivability, ignition control, and self-tuning capability, it offers a stealthy wiring setup and compatibility with popular transmissions.

Key Features

• (4) 100 lb/hr fuel injectors supporting up to 650 HP naturally aspirated or 600 HP forced induction
• 3.5” handheld touchscreen for setup, tuning, and gauge monitoring with no laptop needed
• Integrated ignition timing control for improved idle stability and wide-open throttle performance
• Self-learning fuel maps with Bosch LSU 4.9 wideband O2 sensor for real-time tuning
• Stealth wiring exits below rear fuel injector cover for clean installation
• Transmission control for GM TH350/400, 200R4/700R4, Ford C4/C6, and Pre-2009 GM 4L60E/4L80E
• Built-in 1 Bar MAP sensor and support for boost, nitrous, and dry nitrous control
• OEM style TPS/IAC sensors included for durability

Fitment

• Universal fit for engines using 4150 squarebore carburetor flange
• Compatible with GM LS engines (24x or 58x crank trigger)
• Supports various automatic transmissions including GM 4L60E/4L80E and Ford C4/C6

Note: Requires an external fuel pressure regulator set to 58.5 PSI (Holley P/N 12-886 or equivalent). Verify compatibility before ordering. Installation may require tuning adjustments for optimal performance.