Holley EFI Terminator X Max Stealth 4150 – Shiny

Holley EFI Terminator X Max Stealth 4150 – Shiny

The Holley EFI Terminator X Max Stealth 4150 – Shiny is a universal, bolt-on EFI system designed to replace a 4150 carburetor flange, supporting up to 650 HP naturally aspirated or 600 HP forced induction engines. It features advanced self-tuning fuel maps, integrated ignition timing control, and stealth wiring for a clean, professional installation on American V8 engines.

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 setup, tuning, and gauge displays—no laptop needed
• Advanced annular discharge rings for improved fuel atomization and reduced fuel delay
• Bosch LSU 4.9 wideband O2 sensor for real-time fuel map learning and datalogging support
• Integrated ignition timing control improves idle stability and wide-open throttle performance
• Transmission control provisions for GM 4L60E/4L80E and classic GM/Ford automatics (TH350/400, 200R4/700R4, C4/C6)
• Stealth wiring exits below rear fuel injector cover for a clean installation
• Bolt-on 4150 flange with squarebore style fits many factory intake manifolds and air cleaners
• Supports boost, dry nitrous, knock retard, and multi-stage/progressive nitrous control

Fitment

• Universal 4150 flange fits most carbureted American V8 intake manifolds
• Compatible with GM LS engines using 24x or 58x crank sensors
• Supports Pre-2009 GM 4L60E/4L80E and classic GM/Ford automatic transmissions

Note: Requires external fuel pressure regulator set to 58.5 PSI (Holley P/N 12-886 or equivalent). Verify compatibility before ordering. Distributor and fuel pump not included. Professional installation and tuning recommended for best results.