Link Engine Management
Link G4X WRXLink (V5–V6) WRX6X ECU
Link G4X WRXLink (V5–V6) WRX6X ECU
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The Link G4X WRXLink (V5–V6) WRX6X ECU is a direct-fit engine management system designed for Subaru Impreza WRX platforms using the EJ20 engine. It installs into the factory ECU enclosure and connects directly to the OEM wiring loom with no modification required.
This ECU is intended for manual transmission vehicles only and provides full G4X tuning capability while retaining core factory functionality.
Important: Please confirm your ECU pinout matches the header shown in the product images before purchase. An air temperature sensor is highly recommended.
CAN note: Version 1.4 onwards features a new 4 pin powered CAN connector. Older CANPCB cables are not supported. Use the CANJST4 cable (PN 101-0198).
Engine Control Capability
- Designed for EJ20 turbo engines
- Sequential fuel injection
- Digital triggering using OEM patterns
- Precision closed loop cam control
- Staged injection support
- Knock control with windowing
Hardware and Platform
- Direct plug-in installation using factory ECU enclosure
- Continuous onboard barometric correction
- USB tuning connection
- CAN communication support
- 512 MB onboard data logging
Vehicle Compatibility
- Subaru Impreza WRX and STI EJ20 (1998–2000)
- GC8F and GC8G chassis
- MY99 and MY00 models
- Manual transmission only
G4X Plug-In Key Features
- Up to 6D fuel and ignition mapping
- OEM idle hardware supported
- 5D boost control with three switchable tables
- Launch control, anti lag, and flat shift
- Individual cylinder fuel and ignition correction
- Gear-based fuel, ignition, and boost compensation
- QuickTune automated fuel tuning
- Selectable dual fuel, ignition, and boost maps
- CAN communication support
I/O Expansion
Expansion Connector 1
- GND – Sensor ground
- +5V – Low current +5V supply
- DI8 – Digital input
- DI9 – Digital input
- Analogue Voltage 8 (0–5V)
- Analogue Voltage 9 (0–5V)
- IGN7 – Auxiliary ignition output
- IGN8 – Auxiliary ignition output
Expansion Connector 2
- GND – Sensor ground
- +5V – Low current +5V supply
- DI5 – Digital input
- DI7 – Digital input
- Analogue Voltage 5 (0–5V)
- Analogue Voltage 6 (0–5V)
- Analogue Temperature 2
- Analogue Temperature 3
Downloads and Resources
