Holley EFI Terminator X Stealth GM LS 4150 – Black

Holley EFI Terminator X Stealth GM LS 4150 – Black

The Holley EFI Terminator X Stealth GM LS 4150 – Black is a high-performance EFI system designed for GM LS engines with 24x crank reluctor wheels. It supports up to 650 HP naturally aspirated and 600 HP forced induction, featuring four 100 lb/hr injectors and integrated ignition timing control. Its stealth design fits most stock-style air cleaners and offers plug-and-play compatibility with factory LS coils for a clean, powerful upgrade.

Key Features

• Supports up to 650 HP with four 100 lb/hr fuel injectors at 58.5 PSI fuel pressure
• Integrated ignition timing control with plug-and-play factory LS coil harness compatibility
• Self-tuning ECU with simple calibration wizard—no laptop required
• 1 bar MAP sensor built into the ECU for precise boost and vacuum control
• High-resolution full-color touchscreen for setup, tuning, and gauges
• Includes Bosch LSU 4.9 wideband O2 sensor for real-time fuel map learning
• Supports boost control, dry nitrous, multi-stage and progressive nitrous control
• CAN-BUS support and datalogging capabilities included
• All wiring exits below the fuel bowls for a stealthy installation

Fitment

• GM LS engines with 24x crank reluctor wheels
• 4150 squarebore throttle body flange

Note: External fuel pressure regulator required, set to 58.5 PSI (not included). Verify compatibility with your transmission and vehicle before ordering. Installation requires tuning for optimal performance.