Installation Time
(approx) 5 Hours
Difficulty Level:
Mechanical expertise or professional installation required.
Installation Guides
No guide available for this part yet.
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Holley EFI Terminator X Max GM Gen V LT4 Direct Injection Kit with 6L80E/6L90E Transmission Control; Early Application (Universal; Some Adaptation May Be Required)
Item CC27456
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Product Information
Features, Description, Q&A, Specs & Installation
Features
- Plug And Play GM Gen V LT Engine Control Including GDI And VVT Support
- Ideal For Swapping Late Model GM Gen V LT Engines Into Vintage Vehicles
- 3.5” Handheld Gets Your Engine Running In No Time With A Step-By-Step Calibration Wizard
- GM LS And LT Drive-By Wire Throttle Body Control Terminator X Max Only
- GM 6L80 And 6L90E Transmission Control
- Included Engine Harness Plugs Directly Into The Factory LT DI Injector Sub Harness
- OEM Injectors Supported With Part Numbers Provided In The Handheld Wizard Or Software
- Genuine Bosch LSU 4.9 Wideband Control Will Not Work With LSU 4.2 Oxygen Sensors
- On-Board Diagnostic LEDs For ECU Power, Engine Run, Wideband Status, TPS Calibration, Crank Signal, Cam Signal, VVT Status, Pump Control, And DI Injectors
- Built-In 1bar MAP Sensor With Vacuum Hose Adapters Included (1/8th, ¼, And 3/16ths). For Boosted Applications, You Can Disable The Internal MAP Sensor And Utilize An External LT MAP Sensor; The Harness Comes With The Connector Terminated
- 4 Inputs: 12v, Ground, 5v, And Frequency For Additional Sensors Or Triggers Such As Nitrous Activation Or A Trans Brake; Fuel And Oil Pressure Inputs Are Pre-Terminated
- 4 Outputs: Ground PWM For Accessories Such As Fans, Boost Control, Nitrous Control, IAC Kit, And More
- Boost Control With Boost Vs Time, Boost Vs Gear, Boost Vs RPM, Boost Vs Speed, And Boost Safeties
- Nitrous Control: Single Channel Of Wet Or Dry, Progressive Or Non-Progressive, Rich/Lean Safeties And Target Closed Loop AFR
- Advanced Tables: 4x 1D Tables, 1x 1D Per Gear Table, 4x 2D Tables, 1x 2D Per Gear Table
- Integrated Data Logging To The 3.5” Handheld SD Card
- Free EFI Tuning Software For Complete Control Of Your Terminator X Power Plant
- DI Fuel Rail Pressure Sensor Early Application
- Drive-By-Wire Support For LT Throttle Body
- Emission Code 3
- Engine GM Gen V LT4
- Forced Induction Support Yes
- Fuel Injectors Included No
- Fuel Pump Included No
- Grade Type Performance
- Handheld Included Yes
- Injector Connector Direct Injection
- Product Type EFI System
- Self-Tuning Yes
- Transmission 6L80 6L90E
- User-Tuneable Yes
- Fits Universal; Some Adaptation May Be Required. Early Application Engines Use 4-Pin Fuel Pressure Sensor To Verify Compatibility
Description
Comprehensive Engine Control. The Holley EFI Terminator X Max GM Gen V LT4 Direct Injection Kit with 6L80E/6L90E Transmission Control; Early Application is designed to give you full command over your GM Gen V LT4 engine and associated transmission control. This system replaces the factory ECU with an intuitive, user-friendly device that allows real-time adaptive fuel strategies, drive-by-wire throttle control, and seamless integration with factory injectors and variable valve timing systems. It is essential for those seeking to achieve unparalleled tuning flexibility, improved engine performance, and adaptability across a range of naturally aspirated and forced induction setups.
Construction and Appearance. Built with high-quality electronic components, the system features an ECU designed for automotive use. The included 3.5-inch touchscreen handheld controller provides a clear, responsive interface suitable for garage and track environments. Wiring harnesses are designed to plug directly into the factory LT direct injection injector sub-harness, ensuring reliable signal transmission.
Installation. Installation features plug-and-play connectivity that interfaces directly with factory fuel system components and sensors. The kit includes necessary connectors and adapters to streamline setup for early application Gen V LT engines. Users should confirm compatibility with the engine’s 4-pin fuel pressure sensor for early applications and have knowledge of sensor identification to ensure proper integration.
Application and Fitment. This kit fits early GM Gen V LT4 engines identified by a 4-pin fuel pressure sensor and supports 6L80E and 6L90E transmission control. It is suited for performance-oriented builds requiring direct injection and drive-by-wire throttle management in non-emissions-controlled vehicles.
Holley EFI 550-1633-6
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- Multi-Port Throttle Body Fuel Injection Systems
4.8
Reviews of Holley EFI Engine Products (5)
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