Holley EFI Terminator X Max Stealth 4150 – GM LS Engines

Holley EFI Terminator X Max Stealth 4150 – GM LS Engines

The Holley EFI Terminator X Max Stealth 4150 – GM LS Engines is a high-performance EFI system designed to replace your carburetor on GM LS 24x or 58x crank reluctor engines. It supports up to 650 HP naturally aspirated and 600 HP forced induction, featuring a stealthy wiring exit for a clean installation and integrated transmission control for GM 4L60 and 4L80 transmissions.

Key Features

• Four 100 lb/hr fuel injectors supporting up to 650 HP naturally aspirated or 600 HP forced induction
• 3.5” LCD handheld touchscreen for easy setup, tuning, and monitoring without a laptop
• Self-learning fuel maps with integrated ignition timing control for improved idle, drivability, and horsepower
• Plug and play transmission control for GM 4L60 and 4L80 transmissions
• Stealth wiring exits below the rear fuel injector cover for clean engine bay appearance
• Built-in 1 Bar MAP sensor and Bosch LSU 4.9 wideband O2 sensor for precise tuning
• Supports boost control, dry nitrous, multi-stage and progressive nitrous control, and knock retard
• Bolt-on 4150 flange fits many factory intake manifolds and stock air cleaners

Fitment

• GM LS engines with 24x or 58x crank reluctor wheels
• Compatible with GM 4L60E and 4L80E transmissions for integrated control

Note: Requires external fuel pressure regulator set to 58.5 PSI (Holley P/N 12-886 or equivalent). Distributor, fuel pump, fuel hose, and mounting hardware not included. Verify fitment before ordering.