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Holley Terminator X "MAX" EFI System- 58x - LS2, LS3, LS7 & Truck Gen 4


We are currently out of stock on ALL Terminator X & X-Max Systems. Our backorders dating back to October 2022 have not yet been fulfilled from Holley. We recommend placing an order & waiting, as it'll take a while for these to be "in stock" anywhere. If you wait for them to be on the shelf, it might be 2024! :) 


Features and Benefits

  • Plug and play LS engine control
  • On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal. Allow you to identify any Critical engine issues at a glance
  • MAP Sensor vacuum hose adapters (1/8th – ¼ and 3/16ths)
  • Genuine Bosch LSU 4.9 Wideband Control (Will not work with LSU 4.2 Oxygen Sensors)
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for 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 – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, 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 Datalogging to the 3.5” Handheld SD Card
  • Free EFI Tuning Software for complete control of your Terminator X power plant
  • For more detailed information, visit https://www.holley.com/products/fuel_systems/fuel_injection/terminator_x/


LS3 / 58X =
LS3/LS7 & 07+ TRUCK APPLICATIONS USING AN EV6 INJECTOR, 58X CRANK RELUCTOR, 4X CAM GEAR, AND DRIVE BY CABLE (With trans control) OR, DRIVE BY WIRE (With or without trans control). 

58x / EV1 / DBC / Trans: 550-920
58x / EV1 / DBW / No trans: 550-933
58x / EV1 / DBW / Trans: 550-935
58x / EV6 / DBC / Trans: 550-918
58x / EV6 / DBW / No trans: 550-931
58x / EV6 / DBW / Trans: 550-928