Holley EFI Terminator X Max – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3

Holley EFI Terminator X Max – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3

The Holley EFI Terminator X Max – Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS3 is a fully user-tuneable engine management system designed specifically for GM LS truck engines and LS2/LS3 platforms. It provides real-time fuel learning, advanced boost and nitrous control, and integrated transmission management to deliver precise control and improved performance for naturally aspirated and forced induction setups.

Key Features

• Designed for GM LS 4.8/5.3/6.0 truck engines and LS2/LS3 with 58x crank, 4x cam, and 4L60E/4L80E transmissions
• Real-time fuel map learning removes guesswork from tuning
• High impedance injector drivers support stock LS and Holley EFI injectors
• Integrated Bosch LSU 4.9 wideband O2 sensor for accurate AFR feedback
• On-board 1 bar MAP sensor ideal for naturally aspirated or nitrous applications
• 4 programmable inputs and 4 outputs for accessories like electric fans, boost control, and nitrous
• Boost control with multiple strategies and safeties
• Progressive and multi-stage nitrous control with rich/lean safeties and closed loop AFR targeting
• Advanced customizable tables including per gear fuel and safety controls
• CAN/USB tuning cable included for laptop tuning and real-time adjustments
• Compact, textured black ECU housing with diagnostic LEDs for quick troubleshooting
• Plug-and-play compatibility with Holley EFI accessories and digital dash modules

Fitment

• GM Gen IV LS 4.8L, 5.3L, and 6.0L truck engines
• LS2 and LS3 engines with 58x crank trigger
• 4L60E and 4L80E automatic transmissions

Note: Requires free Terminator X software for initial setup and tuning; verify compatibility with your injector type and transmission before ordering.