Holley Terminator X Max EFI Kit for Late Gen V LT4 Engines Chevy/GMC C/K 1988-1998

Test boost against time, gear, RPM, and speed in your late Gen V LT4 engine via the Holley Terminator X Max EFI kit (550-1624). This kit is the perfect way to enjoy GM 4L60 and 4L80 transmission control within 1988-1998 Chevy and GMC C/Ks. Not only does it offer boost and rich/lean safeties, but it also boasts LT drive-by-wire throttle body control. It even lets you run a single channel of wet or dry and progressive or non-progressive nitrous output. Plus, it comes with factory fuel injectors and fuel pumps, saving you the trouble of redoing your entire fuel system.

Features and Benefits:
- Great for Late GM Gen V LT Swap in Vintage Vehicles
- GM 4L60 and 4L80 Transmission Control
- GM LS and LT Drive-by-Wire Throttle Body Control
- Boost Control: Boost vs Time, Gear, RPM, or Speed
- Nitrous Control: Wet or Dry, Target Closed Loop AFR, & More
- Features Boost & Rich/Lean Safeties
- 3.5” Handheld Tuner Eases Installation via Calibration Wizard
- Tuner has Integrated Data Logging
- Includes Factory Fuel Injectors & Fuel Pumps
- Engine Harness Plugs Directly into Factory LT Sub-Harness
- 4 Inputs: 12v, Ground, 5v, & Frequency; 4 Outputs: Ground & PWM
- Inputs and Outputs are Programmable for Electric Fans & More
- Features GDI & VVT Support
- Genuine Bosch LSU 4.9 Wideband Control
- On-Board Diagnostic LEDs for Wide Variety of Issues
- Built-in 1bar MAP Sensor & Vacuum Hose Adapters
- (4) 1D Tables, (1) 1D Gear Table, (4) 2D Tables, & (1) 2D per Gear Table
- Easy-to-Use Software Suite that Allows Full Laptop Access

Setup is straightforward since the 3.5” handheld tuner is programmed with a calibration wizard. Its software suite also gives full access to laptops, letting users get as in-depth with tuning as they want. The inputs and outputs can even be programmed for electric fans, boost control solenoids, and progressive nitrous control. To make performance monitoring easy, the tuner has integrated data logging. Meanwhile, the on-board diagnostic LEDs keep you informed over engine statuses like ECU power and cam signals. Just connect the engine harness to the factory LT sub-harness to take full advantage of all this plus GDI and VVT support!

Vehicle Fitment:
- 1988-1998 Chevy/GMC C/K
*For late GM Gen V LT4 engines ONLY

Tech Tips:
- For boosted applications, you can disable the internal MAP sensor and use an external LT MAP sensor.
- To identify if your engine is an early or late application, refer to your fuel pressure sensor, located behind the intake manifold. Early sensors have a 4-pin connector, whereas late sensors have a 3-pin connector.

Please Note: The Bosch LSU 4.9 wideband control will NOT work with LSU 4.2 oxygen sensors.