Holley EFI Terminator X Max Stealth 4150 – Black

Holley EFI Terminator X Max Stealth 4150 – Black

The Holley EFI Terminator X Max Stealth 4150 – Black is a universal plug-and-play EFI system designed to replace your carburetor with a clean 4150 flange fitment. It supports up to 650 HP naturally aspirated or 600 HP forced induction applications and features integrated ignition timing and transmission control for domestic V8 engines. Ideal for enthusiasts seeking improved idle stability, drivability, and horsepower without the complexity of laptop tuning.

Key Features

• (4) 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 Bosch LSU 4.9 wideband O2 sensor for precise fuel control
• Integrated ignition timing control improves idle stability and wide open throttle performance
• Stealth wiring exits below rear fuel injector cover for clean installation
• Transmission control for GM 4L60E/4L80E and kick down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6
• Built-in 1 Bar MAP sensor and support for boost, nitrous, and dry nitrous control
• Universal 4150 squarebore flange fits many factory intake manifolds and air cleaners

Fitment

• Universal fit for carbureted domestic V8 engines with 4150 squarebore flange
• Compatible with GM LS engines using 24x or 58x crank triggers
• Supports Pre-2009 GM 4L60E/4L80E transmissions and classic GM/Ford automatics with kick down

Note: Requires external fuel pressure regulator set to 58.5 PSI (Holley P/N 12-886 or equivalent). Verify compatibility with your intake manifold and distributor setup before ordering.