Holley EFI Terminator X Stealth GM LS 4150 – Gold

Holley EFI Terminator X Stealth GM LS 4150 – Gold

The Holley EFI Terminator X Stealth GM LS 4150 – Gold is a high-performance EFI system designed for GM LS engines with 24x crank reluctor support. Featuring four 100 lb/hr fuel injectors, it supports up to 650 HP naturally aspirated or 600 HP forced induction. This self-tuning system simplifies installation and tuning with integrated ignition timing control and a full-color touchscreen, making it ideal for enthusiasts seeking reliable power and drivability improvements.

Key Features

• Supports up to 650 HP naturally aspirated and 600 HP forced induction
• Includes four 100 lb/hr fuel injectors rated at 58.5 PSI
• Integrated ignition timing control with plug-and-play GM LS coil harness compatibility
• Self-tuning ECU with simple calibration wizard—no laptop required
• Built-in 1 bar MAP sensor and Bosch LSU 4.9 wideband oxygen sensor for real-time fuel learning
• High-resolution full-color touchscreen for setup, tuning, and gauges
• Supports boost control, dry nitrous, multi-stage and progressive nitrous control
• CAN-BUS support and datalogging capabilities included
• All wiring exits below the fuel injector bowls for a stealthy installation
• Air entry machined to fit most stock-style air cleaners with locator provisions

Fitment

• GM LS engines with 24x crank reluctor wheels
• 4150 squarebore throttle body flange, 1.75 inch bore

Note: External fuel pressure regulator (set to 58.5 PSI) is required but not included. Verify compatibility with your transmission and supporting components before installation. Tuning adjustments may be necessary for optimal performance.