2007-2014 Subaru WRX STI Link ECU G4X
Link ECU G4X Subaru WRX and STI PlugIn ECU — WRX11X
Upgrade your Subaru WRX or STI with the Link ECU G4X WRX11X PlugIn ECU. This advanced standalone engine-management system installs inside the factory ECU enclosure and connects to the original wiring loom, giving you powerful tuning capabilities without installing a universal harness.
Designed for compatible turbocharged EJ20 and EJ25 applications, the WRX11X provides precise control over fuel, ignition, boost, variable cam timing, data logging and advanced motorsport functions.
FREE Link ECU USB Tuning Cable — $70 Value
Every WRX11X ECU purchased from Kugan Tuning includes a compatible Link ECU USB tuning cable at no additional cost. Connect your laptop directly to the ECU for configuration, diagnostics, data logging and professional tuning.
Why Choose the Link G4X WRX11X?
- Installs inside the factory OEM ECU enclosure
- Connects to the original engine wiring loom
- No complete standalone wiring harness required
- Supports compatible turbocharged EJ20 and EJ25 engines
- Supports most factory vehicle features
- Advanced fuel, ignition, boost and camshaft control
- Four-pin powered CAN connection
- 512 MB of onboard data-logging memory
- Expandable inputs and outputs
- FREE Link ECU USB tuning cable included—a $70 value
- FREE remote setup support included—a $297 value
Compatible Subaru Applications
2007–2014 Subaru WRX and WRX STI
Compatible with GR, GV, GH and GE chassis for the following markets:
- Japanese domestic market
- Australian domestic market
- South African domestic market
- European market
Compatible vehicles must be equipped with a turbocharged EJ20 or EJ25 engine.
2008–2010 USDM Subaru WRX and WRX STI
Compatible with USDM models using the common international Denso ECU pinout.
2015–2021 Subaru WRX STI
Compatible with VAB and VAF chassis for the following markets:
- Japanese domestic market
- Australian domestic market
- South African domestic market
- European market
Compatible vehicles must be equipped with a turbocharged EJ20 or EJ25 engine.
USDM Compatibility Notice
Most 2011 and newer USDM models require the dedicated WRX11 USDM ECU. Refer to the supported-model documentation and verify your factory ECU connector before ordering.
View the Link ECU WRX11X for USDM applications
Important Compatibility Information
- Compatible with manual-transmission vehicles only
- Compare your factory ECU connector with the connector shown in the product photos before ordering
- Due to variations between Subaru models and markets, review the Configuration – Memo Text inside PCLink before completing the setup
- An aftermarket intake-air-temperature sensor is highly recommended
- The security or immobilizer warning light may remain illuminated on certain models
- Verify the vehicle’s model year, market, chassis code, engine and ECU pinout before purchasing
- Professional installation and calibration are strongly recommended
Supported Factory Features
Most factory functions are supported, including:
- Driver Controlled Center Differential—DCCD
- Hill-start assist
- Subaru Intelligent Drive—SI-Drive
- Cruise control
- Variable camshaft control
- Anti-lock braking system—ABS
Feature support can vary by model, year and market. Additional configuration may be required.
Powered CAN Connection
This PlugIn ECU uses Link ECU’s newer four-pin powered CAN connector and cannot use the older CANPCB cable.
Use the Link ECU CANJST4 cable, part number 101-0198, to connect compatible CAN devices. This connection provides:
- CAN communication
- Protected 12-volt power supply
- Ground connection
- Self-resetting fuse rated for 3 amps of continuous current
The CANJST4 cable is sold separately unless specifically selected or included with your order.
G4X Engine-Management Features
- Up to 6D fuel and ignition mapping
- Sequential fuel injection
- Digital triggering with support for OEM trigger patterns
- Precision closed-loop camshaft control
- OEM idle-control hardware support
- 5D boost control with three switchable tables
- Boost control based on gear, vehicle speed or throttle position
- Launch control
- Anti-lag
- Flat-shift control
- QuickTune automated fuel tuning
- Individual-cylinder correction
- Gear-based fuel, ignition and boost compensation
- Real-time selectable fuel, ignition and boost maps
- Continuous onboard barometric correction
- Staged injection
- Knock control with configurable knock windows
- Hall-effect, variable-reluctance and optical trigger-sensor support
- CAN communication
- Onboard statistics recording
- 512 MB of onboard data-logging memory
I/O Expansion Options
The expansion connector provides the following inputs and outputs:
- Pin 1: Auxiliary output 16
- Pin 2: Digital input 11
- Pin 3: Temperature input 4
- Pin 4: Knock input 2
- Pin 5: Injector output 6
What’s Included
- Link ECU G4X Subaru WRX and STI WRX11X PlugIn ECU
- FREE Link ECU USB tuning cable—a $70 value
- FREE remote setup support—a $297 value
FREE Remote Setup Support — $297 Value
Purchase your Link ECU from Kugan Tuning and receive remote setup support to help prepare the ECU for startup and professional tuning.
Support includes:
- Remote ECU connection and setup assistance
- Basemap selection guidance
- Startup configuration review
- Sensor and input verification
- Professional setup support
This service helps identify configuration and sensor issues before road or dyno tuning, potentially saving troubleshooting time and avoiding preventable problems.
Custom remote tuning and dyno tuning are not included unless separately purchased. Successful startup and operation depend on proper installation, wiring, mechanical condition and ECU configuration.