Holley EFI Terminator X Stealth GM LS 4150 – Shiny

Holley EFI Terminator X Stealth GM LS 4150 – Shiny

The Holley EFI Terminator X Stealth GM LS 4150 – Shiny is a high-performance EFI system designed for GM LS engines with 24x crank reluctor wheels. It supports up to 650 HP naturally aspirated or 600 HP forced induction, featuring four 100 lb/hr fuel injectors and integrated ignition timing control for improved drivability and power. This stealth-style 4150 throttle body fits most stock air cleaners and includes a self-tuning ECU with a full-color touchscreen for easy setup without a laptop.

Key Features

• Supports up to 650 HP with four 100 lb/hr injectors at 58.5 PSI
• Integrated ignition timing control with GM LS 24x coil-on-plug compatibility
• Built-in 1 bar MAP sensor and Bosch LSU 4.9 wideband oxygen sensor for real-time tuning
• Self-tuning ECU with simple calibration wizard and full-color touchscreen handheld included
• Stealth installation with wiring exiting below fuel bowls and air entry machined for stock-style air cleaners
• Supports boost control, dry nitrous, multi-stage and progressive nitrous control
• CAN-BUS support and datalogging capabilities

Fitment

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

Note: External fuel pressure regulator required (set to 58.5 PSI). Transmission kickdown provisions included for GM TH350/400, 200R4/700R4 and Ford C4/C6; Terminator X Max kits offer plug-and-play control for GM 4L60/4L80 transmissions. Verify compatibility before ordering. Fuel pump, fuel hose, intake manifold, and mounting hardware not included.