Subaru WRX V3-4 EJ20 Plug-in ECU

Easy to install. Affordable. Reliable.

G4X Plug-in 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 V3-4 EJ20

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

Suitable Applications:

GC8D.
GC8E.
WRX and STI from 09/1996 to 08/1998.

G4X Plug-in Key Features (where applicable):

Up to 6D fuel and ignition mapping.
Precision closed loop cam control (four cams, independent control).
Sequential fuel delivery.
Digital triggering, all OEM patterns.
OEM idle hardware supported.
5D boost control with three switchable tables.
Motorsport features - anti-lag, launch, flat shift.
Continuous barometric correction (on board).
CAN port.
Quick Tune - 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 megabytes data logging memory.
Staged injection.
Knock with "windowing".

The following expansion connector inputs/outputs are provided:

XS 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
Temp 4 Temperature sensor input
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

EJ20/25

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Link ECU - G4X Subaru WRX V3-4 EJ20 Plug-in ECU