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Easy to install. Affordable. Reliable.

G4X PlugIn ECUs offer the latest in engine management technology, designed to easily maximize the potential from your car.

This ECU fits inside the factory OEM enclosure. Installation is a breeze, with no alteration of the factory wiring loom required for the models listed below.

Designed for the WRX V1-2 EJ20.

  • Please check your pinoutconnector matches the header in the listed photo before purchasing.
  • This ECU works for manual transmissions only.
  • Air temp sensor highly recommended.
  • Most factory features are supported.
  • Check the features tab for I/O expansion options.
  • This ECU will need a modification before E-Throttle is usable.

Suitable Applications:

  • GC8A
  • GC8B
  • GC8C
  • WRX and STI from 10/1992 to 8/1996


G4X PlugIn Key Features (where applicable):

Up to 6D fuel and ignition mapping

Precision closed loop cam control (four cam, independent control)

Sequential fuel delivery

Digital triggering, all OEM patterns

OEM idle hardware supported

5D boost control with three switchable tables

Motorsport features – antilag, launch, flat shift

Continuous barometric correction (on board)

CAN port

QuickTune – automated fuel tuning

Individual cylinder correction

USB tuning cable included

Stats recording into on-board memory

Gear compensations for spark, boost and fuel

Real time selectable dual fuel, ignition and boost maps

Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical

Boost control referenced to gear, speed or throttle position

512 mega bytes data logging memory

Staged injection

Knock with “windowing”

The following expansion connector inputs/outputs are provided:

Expansion connector 1

Gnd Sensor Ground Only

+5V Low Current +5V Supply

DI 5 Digital Input

DI 6 Digital Input

Volt 5 Analog 0-5V input

Volt 6 Analog 0-5V input

An Temp 2 Temperature sensor input

An Temp 3 Temperature sensor input

Expansion connector 2

Gnd Sensor Ground Only

+5V Low Current +5V Supply

DI 9 Digital Input

DI 10 Digital Input

Volt 8 Analog 0-5V input

Volt 9 Analog 0-5V input

Ign 7 Ignition 7 Auxiliary Output

Ign 8 Ignition 8 Auxiliary Output

Download Manual

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Click here to download the full Specifications PDF.