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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 V5-6 EJ20.

Please check your pinout 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

Note: V1.4 onwards of this Plug-in features a new 4 pin powered CAN connector and cannot use the old CANPCB cable for CAN connection. Use the CANJST4 (Code 101-0198) cable for connecting CAN devices. This new 4 pin port and cable provides not only the CAN connection, but also a protected 12V power supply and ground for powering the CAN devices. The power supply is protected by a self-resetting fuse rated at 3A continuous.

Suitable Applications:



WRX and STI from 09/1998 to 08/00

MY99 & MY00

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:

XS connector 1

Gnd Sensor Ground Only

+5V Out Low Current +5V Supply

DI 8 Digital Input

DI 9 Digital Input

An Volt 8 Analog 0-5V input

An Volt 9 Analog 0-5V input

Ign 7 Ignition 7 Auxiliary Output

Ign 8 Ignition 8 Auxiliary Output

Expansion connector 2

Gnd Sensor Ground Only

+5V Out Low Current +5V Supply

DI 5 Digital Input

DI 7 Digital Input

An Volt 5 Analog 0-5V input

An Volt 6 Analog 0-5V input

An Temp 2 Temperature sensor input

An Temp 3 Temperature sensor input

    Excluding GST/HST
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